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Littérature scientifique sur le sujet « Vitamin D in the body »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 30 juillet 2024

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Articles de revues sur le sujet "Vitamin D in the body"

1

Koprivica, Marko, et Svetlana Kašiković-Lečić. « Causes, consequences, and treatment of vitamin D deficiency in humans ». Medicinski casopis 57, no 3 (2023) : 119–24. http://dx.doi.org/10.5937/mckg57-43860.

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This group of vitamins consists of vitamin D2 and vitamin D3, which are synthesized in the body of some invertebrates and plants, but also in the human body. Ultraviolet rays cause vitamin D to integrate under the skin. The vitamin is transported via specific proteins to all parts of the body, where it performs numerous roles. The low level of vitamin D in blood is a current public health problem. Vitamin D deficiency is especially pronounced among the elderly and obese. Currently, vitamin D deficiency is associated with an increase in bone and cardiovascular diseases, diabetes, malignant, autoimmune and allergies diseases. That is why it is extremely essential to establish and correct the deficiency of this vitamin in a timely manner. Compensation can be done partly through food, but also through oral supplements, and in more severe cases, by intramuscular administration of vitamins.
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Khan, Nauman, et Tahmina. « Vitamin D Deficiency in the Elderly Patients and Role of Vitamin D in the Prevention of COVID-19 Infection ». European Journal of Medical and Health Sciences 3, no 2 (31 mars 2021) : 8–9. http://dx.doi.org/10.24018/ejmed.2021.3.2.765.

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SARS Covid'19 is declared as a global pandemic by World Health Organization [1]. The aim of this short report is to find out the association of Vitamin D in prevention of Covid'19 in elderly patients who are already having other co-morbidities. People of any age are susceptible to Corona virus but the elderly patients and patients with chronic underlying diseases are at higher risk. Many elderly patients with COVID-19 are at risk of mal-nutrition [2]. Vitamins are of two types, Lipid soluble vitamins and water-soluble vitamins [3]. Lipid soluble vitamins can be stored in the body while water soluble vitamins cannot be stored in the body, hence needed to take regularly [4]. Vitamin D is a lipid soluble vitamin also it can be synthesized by our own body.
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Ravichandran, S., Hülya Çiçek, Rumeysa Duyuran et R. M. Madhumitha Sri. « Biochemistry and metabolism of vitamin D ». International Journal of Clinical Biochemistry and Research 10, no 1 (15 avril 2023) : 28–36. http://dx.doi.org/10.18231/j.ijcbr.2023.005.

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Vitamins are generally essential; they are mandatory compounds that are not produced in the body and must be taken through food. These compounds, which play a role in enzyme reactions as coenzymes, are indispensable for the human organism. Among them, vitamin D, which is of great importance, can be made in the body differently from others. Vitamin D is a fat-soluble vitamin. Since its chemical structure is similar to steroid hormones and is synthesized in tissue and released into the circulatory system due act on the target tissue, it can also be classified as a hormone. Vitamin D is a fairly important steroid hormone that plays a role in maintaining bone and calcium homeostasis.
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Mochulska, O. M., O. R. Boyarchuk, M. I. Kinash, T. O. Vorontsova et L. A. Volianska. « The effects of vitamins A, E, D, disorders of their metabolism and the assessment of level of vitamin security in children (literature review) ». Modern pediatrics. Ukraine, no 2(114) (27 mars 2021) : 58–66. http://dx.doi.org/10.15574/sp.2021.114.58.

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Vitamins are a group of biologically highly active, low molecular weight organic compounds of various chemical nature, which are practically not synthesized in the human body or are synthesized in insufficient quantities, mainly income with food, and are vital to ensure for the flow and regulation of metabolic processes in the body. Vitamins are micronutrients that are among the essential (essential) factors of nutrition, their content in food is small, usually in the range from 10 to 100 mg/100 g. Vitamins have an exceptional property — the ability to high biological activity in small doses, without being a source of energy or plastic material, act as biological catalysts for vital body functions. According to physicochemical properties and solubility, vitamins A, E, D belong to fat-soluble, are characterized by thermal stability, resistant to cysts and alkalis, their main characteristic is the ability to promote the assimilation of mаcro- and microelements. Vitamins A, E, D are needed at all stages of growth and development of the child's body, the processes of adaptation. The main types of vitamins metabolism disorders are vitamin deficiency, hypo-, hyper- and dysvitaminosis, polyvitaminosis. It is important to constantly monitor the sufficient content of each vitamins in the daily diet of children. The following methods of assessing vitamin supply are known: clinical, biochemical, calculation of vitamin content. Purpose — to increase knowledgment about the effects of vitamins A, E, D, their importance in metabolism, to analyze the main types of their metabolism disorders, to present possible methods for assessing the supply of vitamins in children. Conclusions. The child's body needs a constant supply of vitamins to maintain their amount at the required level. All vital processes take place in the body during the direct participation of vitamins. Future research in the field of the vitamins A, E, D effects will contribute to a better understanding of their role in ensuring the optimal functioning in a human body. Screening and elimination of vitamin A, E, D deficiency in children can not only improve health, but also help increase the life quality. No conflict of interest was declared by the authors. Key words: vitamins A, E, D, vitamin deficiency, hypovitaminosis, hypervitaminosis, dysvitaminosis, polyvitaminosis, children.
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Kaminsky, O. V. « Vitamin D dosage ». INTERNATIONAL JOURNAL OF ENDOCRINOLOGY (Ukraine) 17, no 5 (4 janvier 2022) : 435–42. http://dx.doi.org/10.22141/2224-0721.17.5.2021.241524.

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Despite its historical name, vitamin D is not a vitamin at all but a hormone that, when activated, is a metabolically active steroid fat-soluble hormone that acts on cellular receptors. Vitamin D hormone is synthesized endogenously and then metabolized in the body, provi-ding that there are the necessary precursors and some factors — the effects of ultraviolet light on the skin. At the same time, vitamins themselves are nutrients, co-factors of biochemical reactions that are not synthesized in the body and cannot interact with receptors, consumed with food, so the hormone D is not a vitamin. Disputes about its use and dosage continue throughout the study period of vitamin D hormone. Most reputable experts in Europe and the USA support the need to replenish and maintain a normal level of vitamin D, believing it to be completely safe and useful. In 2011, the US Endocrine Society issued clinical practice guidelines for vitamin D, indicating that the desired serum concentration of 25(OH)D is > 75 nmol/l (> 30 ng/ml) to achieve the maximum effect of this vitamin on calcium metabolism, bone, and muscle metabolism. According to them, for a consistent increase in serum 25(OH)D above 75 nmol/l (30 ng/ml), adults may require at least 1,500-2,000 IU/day of additional vitamin D, at least 1,000 IU/day in children and adolescents. The most common form of thyroid dysfunction is secondary hyperparathyroidism, which develops due to vitamin D defect/deficiency (80–90 %). Non-optimal serum concentrations of 25(OH)D lead to secondary hyperparathyroidism, potentially leading to decreased bone mineralization and, ultimately, to an increased risk of osteopenia, osteoporosis and fractures, cardiac arrhythmia, and increased blood pressure. Vitamin D is most commonly used at a star-ting dose of 5,000 IU daily for 2–3 months, then transferring patients to maintenance doses of 2,000–4,000 IU/day daily that are consi-dered safe. However, it should be noted that some patients will need constant administration of 5,000 IU of vitamin D per day for a long time (years) to maintain the target optimal level of 25(OH)D in the blood, especially in patients with normocalcemic forms of secondary hyperparathyroidism.
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Jandrić-Kočič, Marijana. « Vitamin D and hypertension ». Medicinski glasnik Specijalne bolnice za bolesti štitaste žlezde i bolesti metabolizma 28, no 89 (2023) : 76–91. http://dx.doi.org/10.5937/mgiszm2389076j.

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Vitamin D is the name for a group of fatsoluble secosteroids, prohormones. Almost all tissues of the human body have vitamin D receptors. 3% of the human genome is under the influence of vitamin D. A significant number of epidemiological studies confirmed the integral connection of vitamin D and its metabolites with the value of blood pressure. Vitamin D lowers blood pressure by inhibiting the renin-angiotensin-aldosterone system, modulating the tone of vascular smooth muscle cells and influencing the vascular endothelium. The results of randomized controlled trials and meta-analyses of the same do not generally support the widespread use of vitamin D in the prevention and treatment of arterial hypertension. Nevertheless, a large number of experimental studies confirm the antihypertensive effect of vitamin D supplementation predominantly in people aged ≥ 50 years as well as obese people with vitamin D deficiency. Further research is needed to determine the potential benefit of vitamin D replacement therapy in hypertensive people.
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Andini, Ary, Farah Nuriannisa, Gilang Nugraha, Nathalya Dwi Kartika Sari, Muslikha Nourma Rhomadhoni, Satya Nugraha Wirayudha, Eka Apriliani Maisurotun Sholeh, Audria Intan Faradita et Fika Dwi Wahyuningtiyas. « The effect of dietary antioxidant vitamins on malondialdehyde, white blood cells, and platelets ». Bali Medical Journal 12, no 2 (16 juin 2023) : 1892–96. http://dx.doi.org/10.15562/bmj.v12i2.4284.

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Introduction: Vitamins have a main role in controlling metabolism in the body and the immune system. Vitamins A, C, and E are known as antioxidant nutrients and vitamin D is essential for innate and adaptive immune function. This study is aimed to analyze the effect of vitamin intake regularly on malondialdehyde (MDA) levels, white blood cell (WBCs) and platelet counts, and differences count of leukocyte Method: The study used 6 groups including the control group without intervention and the intervention group intake of one tablet of vitamin a day for 7 days which were divided into groups of vitamin A 2000 IU, vitamin C 1000 mg, vitamin D 400 IU, vitamin E 100 IU and multivitamins C 1000 mg and D 400 IU Results: Based on the study was explained that vitamins C, D, and E and multivitamins C and D were able to reduce MDA levels and leukocyte counts descriptively but not significantly. The differential leukocyte count has various levels depending on the type of vitamin. Conclusion: Therefore, the consumption of vitamins A, C, D, and E and multivitamins C and D had no significant effect on MDA levels, WBCs count, platelets count, and differential count of leukocyte.
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Tripathy, Tridibesh, Shankar Das, Dharmendra Pratap Singh, Rakesh Dwivedi, Mohini Gautam, Umakant Prusty, Jeevan Krushna Pattanaik, Pramod Bihary Pradhan, S. N. Pandey et Sudhansh Sudhansh. « Homoeopathy & ; the ‘Sunshine Vitamin’ ». EAS Journal of Nutrition and Food Sciences 6, no 01 (13 janvier 2024) : 6–10. http://dx.doi.org/10.36349/easjnfs.2024.v06i01.002.

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There are four fat soluble vitamins & two water soluble vitamins. The fat soluble vitamins are A, D, E & K. The water soluble ones are B & C. The current article discusses the fat soluble vitamin D & its relation to homoeopathic therapeutics. Among the AYUSH ministry of the Government of India, Homoeopathy is ‘H’ in the AYUSH acronym. In homoeopathic therapeutics, oils are a source of medicine. There are many medicines in homoeopathy that are prepared from oils. The sunshine vitamin medicines are such medicine prepared from oils. The role of these medicines is seen in the light of the role of the vitamin D in the body. The benefits of homoeopathy through its qualities of cost effectiveness, clinical effectiveness & zero side effects can be used for mass coverage. Similarly, masses can benefit through large scale roll out of the medicine prepared from the oil which is the source of vitamin D. The dual benefit of this homoeopathic medicine is that it can be used as a supplement & medicine as well. Therefore, this medicine can be a tool in the vitamin A prophylaxis program, as a supplement in the nutritional programs & finally in bone health through its role in calcium & phosphorus metabolism in the body.
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Adeyeye, Emmanuel Ilesanmi, et Olatoye Rauf Abioye. « Vitamins Composition in <i>Clarias gariepinus</i> ; Fish Body Parts (Liver, Muscle, Head) : Reporting on Samples on Fresh, Smoked-Dried and Dry Extract Bases ». International Journal of Pharmacology, Phytochemistry and Ethnomedicine 17 (26 octobre 2021) : 1–16. http://dx.doi.org/10.18052/www.scipress.com/ijppe.17.1.

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An investigation into the vitamins composition levels in Clariasgariepinus fish was carried out and reported in dry extract/fresh; dry extract / smoked-dried on individual vitamins and the sum of the whole vitamins. Parts investigated were liver, muscle and head. Whereas fresh and smoked-dried data were laboratory results, the dry extract portions were calculated and reported as dry extract /fresh sample, dry extract / smoked-dried sample for liver, muscle and head. Results obtained ran thus and all values were in mg/100g vitamin where d = difference, CV% = coefficient of variation and % difference = % value that shows what made dry extract value greater than its reported comparison: dry extract/fresh, % d = 74.5 (all), CV% = 84.0 (all), in liver; dry extract/smoked, % d =24.5 (all), CV% = 19.7 (all), in liver; dry extract/fresh, % d = 74.3 (all), CV% = 83.6 (all), in muscle; ndry extract/smoked, % d = 10.2 (all), CV% =7.60 (all), in muscle;m dry extract/fresh, % d = 68.5 (all), CV% = 73.7 (all), in head; dry extract/smoked, % d = 9.10 (all), CV% = 6.74 (all), in head; dry extract/fresh, % d = 71.9- 74.5, CV% = 79.4 - 82.4 in total vitamin body load; dry extract/smoked, % d = 9. 69- 24.5, CV% = 7.20 - 19.7 in total vitamin body load; dry extract (fresh) – dry extract (smoked), %d = 69.6 - 82.0 in liver; dry extract (fresh) – dry extract (smoked), %d = 72.3 - 76.3 in muscle; dry extract (fresh) – dry extract (smoked), %d = 62.9 - 75.2 in head; dry extract (fresh) – dry extract (smoked), %d = 69.7- 79.0 in total vitamins body load.Among the dry extract values calculated from fresh samples and subjected to chi-square (χ2) values, significant values were observed in vitamins B6, C, A, B1, D, E and total at α=0.05. In the dry extract values from smoked samples, only three significant χ2 values in vitamins A, E and total were observed. In reflection to vitamin concentration levels, percentage higher levels in dry extracts (from fresh) had these trends: liver (74.5%) > muscle (74.3%) > head (68.5%) whereas from smoked, we had liver (24.5%) > muscle (10.2%) > head (9.10%). Also total vitamin body load from dry extract (fresh) was 71.9-74.5% difference and dry extract (smoked) was 9.69 -24.5% difference. It should be noted that liver occupied the higher part of the range in the two comparisons, like 74.5% (fresh) and 24.5% (smoked).
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Varsamis, Nikolaos, Georgios A. Christou, Christos Derdemezis, Alexandros Tselepis et Dimitrios Kiortsis. « The Associations of Dietary Vitamin K Intake and Circulating Vitamin 25(OH)D with Serum Lipoprotein Levels : The Vitamin Deficiency Matters ». Hormone and Metabolic Research 55, no 03 (27 février 2023) : 196–204. http://dx.doi.org/10.1055/a-2020-2080.

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AbstractA synergistic interplay between vitamins K and D appears to exist. We aimed to investigate for the first time whether the associations of dietary vitamin K intake and circulating 25(OH)D with serum lipoprotein levels are influenced by the existence of deficiency of either or both vitamins K and D. Sixty individuals [24 males, 36(18–79) years old] were examined. Vitamin deficiency of K1 and D were defined as vitamin K1 intake/body weight (BW)<1.00 μg/kg/day and circulating 25(OH)D<20 ng/ml, respectively. In individuals with vitamin K1 deficiency, the vitamin K1 intake/BW correlated positively with high density lipoprotein-cholesterol (HDL-C) (r=0.509, p=0.008) and negatively with serum triglycerides (TG) (r=–0.638, p=0.001), whereas circulating 25(OH)D correlated negatively with TG (r=–0.609, p=0.001). In individuals with vitamin D deficiency, the vitamin K1 intake/BW correlated positively with HDL-C (r=0.533, p=0.001) and negatively with TG (r=–0.421, p=0.009), while circulating 25(OH)D correlated negatively with TG (r=–0.458, p=0.004). The above-mentioned associations of vitamin K1 intake/BW and circulating 25(OH)D with serum lipoproteins were not detected in individuals without vitamin K1 deficiency or the ones without vitamin D deficiency. The vitamin K2 intake/BW correlated negatively with low density lipoprotein-cholesterol (LDL-C) (r=–0.404, p=0.001). In conclusion, the associations of vitamin K1 intake with TG and HDL-C and of circulating 25(OH)D with TG were more pronounced in individuals with deficiency of either or both vitamins K1 and D. Increased dietary vitamin K2 intake was associated with decreased LDL-C.
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Thèses sur le sujet "Vitamin D in the body"

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Logan, Kathryn G. « Seasonal Variation in Vitamin D Levels in Adolescent Girls in Maine ». Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/LoganKG2003.pdf.

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Herselman, Marietjie. « Vitamin D : miracle cure-for-all or cart before the horse ? » Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/86816.

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Inaugural address delivered on 2 November 2011
Marietjie Herselman was born in the Langkloof, where she matriculated at the McLachlan High School. She obtained a BSc (Physiology and Dietetics) degree at Stellenbosch University and for the next 18 years worked as a dietitian at Tygerberg Hospital, where she specialised in renal nutrition. She obtained a master’s degree in nutrition in 1985 and in 1991 was appointed as a lecturer in the Department of Human Nutrition, Faculty of Health Sciences, at Stellenbosch University. In the same year she obtained her PhD in nutritional sciences at this university, where she was later promoted to senior lecturer (1995), associate professor (2001) and full professor (2010). From 2008 to 2010 she was appointed first as acting head and later as head of the Division of Human Nutrition. She served on the Professional Board of Dietetics from 1998 to 2003 and also on various sub-committees of the Board. She regularly reviews papers and research applications for scientific councils/associations as well as five national and four international scientific journals. Currently, she serves on the editorial boards of four international scientific journals and in 2008 she was elected as the co-editor (Africa region) of the international journal Nutrition. She successfully delivered 17 master’s students and published 29 scientific papers in national and international journals and three chapters in textbooks. Marietjie also presented papers at 19 international and 37 national conferences. Three international and four national awards were bestowed on her for her research in renal nutrition. She played a leading role in the initiation of the Community Nutrition Security Project (CNSP) in the Breede Valley, as part of Stellenbosch University’s HOPE Project, as well as the NOMA master’s programme in Nutrition, Human Rights and Governance in collaboration with the universities of Oslo and Akershus (Norway) as well as Makerere and Kyambogo (Uganda).
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Beildeck, Marcy Ellen. « The role of vitamin D and the vitamin D receptor in TCF-4 regulation and silencing of CYP24A1 ». Connect to Electronic Thesis (CONTENTdm), 2009. http://worldcat.org/oclc/454140383/viewonline.

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Billing, Georgia. « Determinants of vitamin D status in mother and infant pairs ». Thesis, University of Cambridge, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709059.

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Landry, Denise. « Interrelationships Between Vitamin D and Body Mass Index and Waist Circumference in Canada ». Thesis, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24344.

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60 % of Canadians have suboptimal vitamin D (<75 nmol/L) and 25% are obese. Obesity has been reported to be a risk factor for low vitamin D, but there is uncertainty about the magnitude of the association. Linear regression was performed using data from the nationally representative cross-sectional Canadian Health Measures Survey (2007-2009). Height, weight, waist circumference (WC), and vitamin D levels were directly measured. There were 5298 participants aged 6 to 79 years. Using a conservative p value of 0.001, body mass index (BMI) category obese / obese I was positively associated and WC was inversely associated with vitamin D level in crude analysis. WC was inversely associated with vitamin D level in multivariate analysis. The pattern of relationship is not the same as other studies, yet this was a large study with direct measurements. There may be issues with linearity of relationships or subgroups disturbing the relationship.
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Hamill, Matthew. « HIV, body composition, bone and vitamin D status in South African women ». Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/270410.

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Cross sectional and observational data suggest that HIV-positive individuals and those receiving antiretroviral (ARV) therapy are prone to higher rates of osteoporosis and osteopaenia than HIV-negative individuals. Likewise, HIV-positive individuals often have low vitamin D status. Evidence is emerging more generally of a strong association between HIV infection and poor bone health. There is also evidence that treatment with ARV therapy (ART) and suboptimal vitamin D status may exacerbate this problem (Brown et al, 2006a, 2010). But, to date, causal relationships have not been fully established. This thesis explores the interactions between these separate factors and provides novel data about the effects of HIV infection and its treatment, on bone health in a particular group of black, South African women. Bone loss and poor vitamin D status in the context of HIV infection are important global health issues because these conditions may affect millions of individuals. If HIVassociated bone loss is causally associated with an increased risk of bone fracture then it is possible that there will be an epidemic of HIV-associated fractures in coming decades, particularly in the developing world, including Africa. Study data have so far often been limited by several factors, including cross-sectional design, absence of control groups, a preponderance of attention to bone outcomes in males and in Caucasians, and a lack of good quality data in Africans living in Africa. Th is study aimed to -assess the magnitude of HIV- and ART-associated changes in areal bone mineral density (aBMD), size-adjusted bone mineral content (SA-BMC) and vitamin D status in adult, premenopausal women living in Johannesburg, South Africa. Ninetyeight HIV-negative (Negative reference: Nref) and 149 HIV-positive women were enrolled to allow for comparison between groups. The HIV-positive women were recruited into those eligible to start ART (Positive low CD4 : Plow, n=75) and those unlikely to require ART (Positive preserved CD4 : Ppres, n=74) during a 12-month followup period. The design was longitudinal with visits at 0, 6 and 12 months for measurement of body composition, bone measures and dietary assessment. Blood and urine samples were collected for the evaluation of relevant musculoskeletal analytes, including 25(0H)D at each time point. Most women ( > 80%) who received ART during the course of the study received South African standard first-line therapy consisting of lamivudine, tenofovir and efavirenz. A post hoe analysis of possible effects of ART was performed by retrospectively dividing HIV-positive women into ART-unexposed (n=66) and ART-exposed (n=74). At baseline there was a high prevalence of overweight with 65%, 65% and 44% with BMI > 25 kg/m2 in Nref, Ppres and Plow respectively. Plow had lower weight, BMI, fat mass, lean mass, waist and hip circumferences than the other groups. Nref and Ppres were not different from each other. There were no differences in aBMD or SA-BMC 1 between groups at baseline and no significant differences in vitamin D status between the groups. The mean ±SD serum 25(0H)D concentrations were 59.7 ±16.5, 59.2 ±16.5 and 61.6 ±22.3 nmol/1 in Nref, Ppres and Plow respectively. Plow had significantly lower serum albumin concentration (p < 0.0001) and higher serum phosphate concentration (p < 0.0001). The magnitude of differences in serum phosphate was: Ppres-Nref = 12. 7 ±2.9%; Plow-Nref = 20.3 ±2.9% and Plow-Ppres = 7.6 ±3.1% (p < 0.001). Tubular maximum Reabsorption of Phosphate/Glomerular Filtration Rate (TmP/GFR) was 11.2 ±3.2% and 27.4 ±3.2% respectively greater in Ppres and Plow than Nref (p < 0.0001), and higher in the Plow compared to Ppres 16.2 ±3.4%, (p=0.0002). Serum alkaline phosphatase and urine phosphate to creatinine ratio were not significantly different (p > 0.05). At the 12-month follow-up, Plow subjects remained lighter than their Nref and Ppres counterparts. However, there was a 3.9 ±0.9% increase in mean weight in the Plow group over 12 months (p < 0.001), which represented 10.2 ±0.8% (p < 0.001) increase in fat, rather than lean, mass accumulation. There were significant mean decreases in aBMD and SA-BMC in Plow subjects, and those exposed to ART of the order of 2-3% at total hip, femoral neck and lumbar spine. There were no significant differences in mean vitamin D status between the groups and no significant changes, the mean 25(0H)D concentrations were 63.3 ±17.7, 66.0 ±18.4 and 61.1 ±20.1 nmol/1 in Nref, Ppres and Plow respectively. Serum albumin concentrations had risen by a mean of 9.1 ±1.1% in the Plow group to reach comparable concentrations with the other groups. Alkaline phosphatase activity had significantly risen in the Plow group compared with the other groups (p < 0.001). Serum phosphate concentration remained higher in Plow than the other groups, though the mean value had not increased. Serum phosphate had significantly increased in Nref from baseline to 12 months 7.0 ±2.3% (p=0.05) and non-significantly in Ppres 5.2 ±2.4%. TmP/GFR had declined from baseline by 11.2 ±3.6% in Plow and non-significantly increased in Nref and Ppres (6.4 ±3.3% and 3.8 ±3.5% respectively). These data suggest that HIV infection in South African women is associated with differences in body composition but not with differences in bone measures or vitamin D status. However, being in the Plow group, and ART exposure, was associated with a significant decrease in mean aBMD and SA-BMC, of the order of 2-3%, over 12 months of observation at the hip, femoral neck and lumbar spine. These decreases, in young women, exceed those seen in early menopause, which is of the order of 1-2% annual decrease. The decreases were evident despite the fact that HIV-positive women exposed to ART had increases in fat mass, weight and serum albumin and alkaline phosphatase over time. In this group serum phosphate concentration and TmP/GFR decreased after the introduction of ART, suggesting an effect of ART on renal phosphate handling. ART exposure was not associated with change in vitamin D status. In the post hoe analysis the biochemical results in ART-unexposed compared to ARTexposed was very similar to that in Ppres compared with Plow. Further studies to assess skeletal effects over a longer time in HIV-positive, ARTexposed and na"ive women are warranted. Studies are also required in post-menopausal women, children and men. Given the high prevalence of overweight and obesity recorded in the study population, there may also be a need for interventions to reduce cardiometabolic disease risk in this population.
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Willis, Kentz S. « Vitamin D status & ; immune system biomarkers in athletes ». Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1798967201&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Natarajan, Radhika. « Vitamin D metabolites inhibit adipocyte differentiation in ₃T₃-L₁ preadipocytes ». Connect to this title, 2008. http://scholarworks.umass.edu/theses/164/.

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Kaewsakhorn, Thattawan. « Roles of calcitriol and its analog on canine transitional cell carcinoma in vitro and in vivo, and in normal canine prostate tissue explants ». Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1181937183.

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Simões, Fernanda Franco Agapito. « Relação entre adiposidade materna e do recém-nascido com concentrações de vitamina D materna e do cordão umbilical ». Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/6/6138/tde-03122015-143614/.

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Introdução - A vitamina D desempenha funções na regulação da homeostase do cálcio e fósforo, diferenciação celular, metabolismo de hormônios e regulação do sistema imune. Sua deficiência em crianças pode ocasionar raquitismo, convulsões e insuficiência respiratória. Objetivo - Determinar a relação entre adiposidade materna e do recém-nascido com as concentrações de vitamina D materna e do cordão umbilical. Metodologia - Foram envolvidas 101 mães e seus respectivos recém-nascidos selecionados no Hospital Maternidade Vila Nova Cachoeirinha, São Paulo. A concentração de vitamina D foi determinada por cromatografia líquida. A composição corporal materna foi determinada por bioimpedância segmentada (InBody®, Coréia do Sul) e a dos recém-nascidos obtida por pletismografia por deslocamento de ar (PEA POD®, USA). Para análise estatística, utilizou-se análise de regressão linear múltipla e coeficiente de correlação de Spearman. Valores de p <0,05 foram considerados significantes. Resultados - As médias das concentrações de vitamina D da mãe e do cordão umbilical foram de 30,16 (DP=21,16) ng/mL e 9,56 (DP=7,25) ng/mL, respectivamente. As médias das porcentagens de massa gorda das mães e dos recém-nascidos foram de 32,32 (DP=7,74) por cento e 8,55 (DP=4,37) por cento , respectivamente. Foi observada relação positiva entre concentração de vitamina D materna e do cordão umbilical (r=0,210; p<0,04). Não foi observada associação entre adiposidade do recém-nascido e concentração de vitamina D do cordão umbilical, nem entre adiposidade materna e concentrações de vitamina D materna e do cordão umbilical. Conclusão Neste estudo, original na literatura internacional, foi utilizado método de referência, validado, de alta precisão e imparcial na estimativa do percentual de gordura neonatal, nem sempre utilizado em outros estudos. Foi observada relação positiva entre concentração de vitamina D materna e do cordão umbilical. A ausência de associação entre as variáveis analisadas pode ser devido à alta prevalência de sobrepeso e obesidade entre as gestantes, baixas concentrações de vitamina D nas gestantes e recém-nascidos, alteração do metabolismo da vitamina D e da composição corporal no período da gestação e imaturidade do processo de sequestro da vitamina D pelo tecido adiposo 1 neonatal. Torna-se relevante o desenvolvimento de estudos prospectivos do tipo coorte para avaliar desde o início da gestação a influência da adiposidaidade materna nas concentrações de vitamina D materna e do cordão umbilical.
Introduction - Vitamin D plays a role in the regulation of mineral homeostasis, cell differentiation, hormone metabolism, and regulation of the immune system. Its deficiency can cause rickets in children, convulsions and difficulty breathing. Objective - To determine the relationship between maternal adiposity and the newborn with concentrations of vitamin D maternal and umbilical cord. Methodology- 101 mothers and their newborns were involved. The prevalence of insufficiency (21-29 ng/ml) and deficiency (<20 ng/ml) of vitamin D were determined. The 25(OH)D concentration was analyzed by liquid chromatography, and the umbilical cord blood was collected for up to 10 minutes after childbirth. The maternal nutritional status was assessed by body mass index before pregnancy. Maternal body composition was determined by bioimpedance segmented. Body composition of newborns was obtained by technology plethysmography air displacement. For statistical analysis, multiple linear regression analysis and Pearsons correlation coefficient were used. P values <0.05 were considered significant. Results - The mean concentration of vitamin D from the mother and the umbilical cord were 30.16 (SD = 21.16) ng/mL and 9.56 (SD = 7.25) ng/mL, respectively. The observed prevalence of maternal vitamin D insufficiency and deficiency were 56.44 per cent and 41.58 per cent . Ninety-five percent (95.92 per cent ) and 89.80 per cent of the newborns had vitamin D insufficiency and deficiency, respectively. The mean maternal prepregnancy BMI was 27.79 (SD = 5.61) kg/m2. The mean percentages of fat mass of mothers and newborns were 32.32 (SD= 7.74) and 8.55 per cent (SD= 4.37) per cent , respectively. Positive relationship between concentration of vitamin D maternal and cord blood (r=0,248; p<0,013) was observed. No relationship between adiposity newborn and concentration of vitamin D in the umbilical cord, or relationship between maternal adiposity and concentrations of vitamin D maternal and umbilical cord was observed. Conclusion - Despite it is an original study, no relationship between maternal adiposity and concentrations of vitamin D maternal and umbilical cord was observed. It is significant further research to investigate the influence of maternal fat in neonatal body composition and vitamin D concentrations in maternal and cord blood.
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Livres sur le sujet "Vitamin D in the body"

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National Center for Health Statistics (U.S.), dir. Vitamin D status : United States, 2001-2006. Hyattsville, MD : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, 2011.

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Workshop on Vitamin D (9th 1994 Orlando, Fla.). Vitamin D : A pluripotent steroid hormone : structional studies, molecular endocrinology, and clinical applications : proceedings of the ninth Workshop on Vitamin D, Orlando, Florida (USA), May 28-June 2, 1994. Sous la direction de Norman A. W. 1938-, Bouillon R et Thomasset M. 1942-. Berlin : W. de Gruyter, 1994.

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1926-, Lipkin Martin, Newmark Harold L, Kelloff Gary et National Cancer Institute (U.S.). Chemoprevention Branch., dir. Calcium, vitamin D, and prevention of colon cancer. Boca Raton : CRC Press, 1991.

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Ann, Cranney, United States. Agency for Healthcare Research and Quality. et University of Ottawa Evidence-based Practice Center., dir. Effectiveness and safety of vitamin D in relation to bone health. Rockville, MD : U.S. Dept. of Health and Human Services, Public Health Service, Agency for Healthcare Research and Quality, 2007.

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1939-, Cooper Cary W., dir. Current research on calcium-regulating hormones. Austin : University of Texas Press, 1987.

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1950-, Garland Frank Caldwell, dir. The calcium connection : A revolutionary diet and health program to reduce hypertension, prevent osteoporosis, and lower the risk of cancer. New York : Putnam, 1988.

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1950-, Garland Frank Caldwell, dir. The calcium connection : A revolutionary diet and health program to reduce hypertension, prevent osteoporosis, and lower the risk of cancer. New York : Simon & Schuster, 1989.

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Tangpricha, Vin, dir. Vitamin D. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26176-8.

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Holick, Michael F., dir. Vitamin D. Totowa, NJ : Humana Press, 2010. http://dx.doi.org/10.1007/978-1-60327-303-9.

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Holick, Michael F., dir. Vitamin D. Totowa, NJ : Humana Press, 1999. http://dx.doi.org/10.1007/978-1-4757-2861-3.

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Chapitres de livres sur le sujet "Vitamin D in the body"

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Heerfordt, Ida M., Peter A. Philipsen et Hans Christian Wulf. « A Handful of Sunscreen for Whole-Body Application ». Dans Sunlight, Vitamin D and Skin Cancer, 381–85. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46227-7_19.

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Juzeniene, Asta, Zivile Baturaite et Johan Moan. « Sun Exposure and Melanomas on Sun-Shielded and Sun-Exposed Body Areas ». Dans Sunlight, Vitamin D and Skin Cancer, 375–89. New York, NY : Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-0437-2_21.

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Pyrżak, B., E. Witkowska-Sędek, M. Krajewska, U. Demkow et A. M. Kucharska. « Metabolic and Immunological Consequences of Vitamin D Deficiency in Obese Children ». Dans Body Metabolism and Exercise, 13–19. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/5584_2014_81.

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Foo, Leng Huat. « Vitamin D, Exercise, and Body Composition in Young Children and Adolescents ». Dans Handbook of Anthropometry, 1337–55. New York, NY : Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-1788-1_81.

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Foo, Leng Huat. « Vitamin D, Exercise and Body Composition in Young Children and Adolescents ». Dans Handbook of Growth and Growth Monitoring in Health and Disease, 2539–58. New York, NY : Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-1795-9_151.

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Abiri, Behnaz, Mohsen Dehghani et Mohammadreza Vafa. « Effect of Vitamin D Supplementation on Muscle Strength, Muscle Function, and Body Composition in Vitamin D-Deficient Middle-Aged Women ». Dans Methods in Molecular Biology, 351–61. New York, NY : Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0471-7_25.

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Gillespie, Bronwen. « Nutritional Status and the Risk of Preterm Birth ». Dans Evidence Based Global Health Manual for Preterm Birth Risk Assessment, 41–51. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04462-5_6.

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AbstractA woman’s body mass index and nutritional status should be assessed in the antenatal period. The evidence indicates that maternal anemia is a risk factor for preterm birth. Ensuring adequate levels of iron and folic acid is essential for general pregnancy health and outcomes. To reduce the risk of pre-eclampsia, daily calcium supplementation for populations with low dietary calcium intake may be advised, although negative interactions between iron and calcium supplements may occur so these two nutrients should be administered several hours apart. In undernourished populations, balanced energy and protein supplementation should also be recommended for pregnant women (though not specifically linked to a reduction in preterm birth). For populations at risk of vitamin D deficiency, possible benefits for general pregnancy outcomes may be gained from vitamin D supplementation. Where dietary zinc is low, it has been suggested that zinc supplementation may reduce the risk of preterm birth. However, further research is required to clarify the benefits of supplementation. For example, vitamin D in combination with calcium may increase the risk of preterm birth. In the antenatal period, the most important focus should be on promoting a good quality diet in general, rather than a specific supplementation regime.
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Kontopoulou, Lamprini Β., Anna Challa, Maria Vaiou, Amalia I. Moula, Ioanna V. Papathanasiou, Georgios Marakis, Georgios E. Karpetas et al. « Increased Body Mass Index (BMI) and Sunscreen Use Are Associated with Inadequate Vitamin D Status in Greek Adults in Winter ». Dans GeNeDis 2020, 307–14. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78771-4_34.

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Bährle-Rapp, Marina. « Vitamin D ». Dans Springer Lexikon Kosmetik und Körperpflege, 585. Berlin, Heidelberg : Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_11071.

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Winter, Jerrold. « Vitamin D ». Dans True Nutrition, True Fitness, 187–98. Totowa, NJ : Humana Press, 1991. http://dx.doi.org/10.1007/978-1-4612-0479-4_15.

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Actes de conférences sur le sujet "Vitamin D in the body"

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Cisneroz, Martin, Maria Elena Martinez, Patricia A. Thompson et Elizabeth T. Jacobs. « Abstract A120 : Physical activity, body mass index, and vitamin D metabolite concentrations ». Dans Abstracts : AACR International Conference on Frontiers in Cancer Prevention Research‐‐ Dec 6–9, 2009 ; Houston, TX. American Association for Cancer Research, 2010. http://dx.doi.org/10.1158/1940-6207.prev-09-a120.

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Peric, Ivan, Barbara Gilic et Mateo Blazevic. « Vitamin D status among youth soccer players ; association with chronological age, maturity status, jumping and sprinting performance ». Dans 12th International Conference on Kinanthropology. Brno : Masaryk University Press, 2020. http://dx.doi.org/10.5817/cz.muni.p210-9631-2020-14.

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Purpose: Vitamin D is known to have a significant role in numerous body-system processes. Specifically, it has an impact on muscle functioning and, therefore sports performance. Chil-dren and adolescents have increased need for vitamin D because of its importance in growth and development, and it is evident that they are more susceptible to have vitamin D deficien-cy. Consequently, vitamin D status is particularly important issue in youth competitive sport. The aim of this study was to determine the prevalence of vitamin D deficiency/insuficiency (measured as 25(OH)D concentration), and the possible associations between vitamin D, with age, maturity status, sprinting- and jumping-performance among youth soccer players. Methods: The sample of participants in this research comprised 62 youth soccer players (age: 15.7 ± 2.2 years). They were divided into two categories according to 25(OH)D levels measured at the end of the winter season: group with inadequate levels of 25(OH)D (vitamin D deficiency/insuficiency [ 75 nmol/L]). Biological maturity status (maturity offset) was calculated from participants age and height by the following equation: Maturity offset = −7.999994 + (0.0036124 × (age(yrs.) × height(cm)). Performance variables were 10 meters sprint test (S10m) and countermovement jump test (CMJ). Results: Results showed relatively good 25(OH)D concentrations (78.32 ± 23.39 nmol/L), with prevalence of deficiency ( < 50 nmol/L) in 8.06%, and insuficiency (50–75 nmol/L) in 46.77% athletes. Significant correlations were evidenced between the CMJ and 25(OH)D level (R = 0.27, p < 0.05), but chronological age was also correlated with CMJ (R = 0.64, p < 0.05). Further, higher chronological age was found in participants with suficient vitamin D levels (15.1 ± 2.4 vs. 16.4 ± 1.6 years; t-test = 2.43, p < 0.05). However, no significant as-sociation was evidenced between vitamin D and maturity status. Conclusion: Vitamin D groups significantly differed by chronological age but not by maturity status, which collectively with correlation between CMJ and vitamin D status indicates that both vitamin D status and performance in youth soccer players is actually influenced by chronological age. Meanwhile, biological age doesn’t have a significant physiological influ-ence on vitamin D concentration, while some external factors (i.e. time spent outdoors, pa-rental control, sunscreen usage), should be considered important.
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Mu, Yaxuan. « Relationship between vitamin D and its metabolites deficiency in the body and metabolic syndrome (hypertension, obesity, hyperglycemia) ». Dans Third International Conference on Biological Engineering and Medical Science (ICBioMed2023), sous la direction de Alan Wang. SPIE, 2024. http://dx.doi.org/10.1117/12.3013054.

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Park, Dae-Hwan, Seung-Taek Oh et Jae-Hyun Lim. « Development of a Safe UVB LED Indoor General Lighting to Support Vitamin D Synthesis in the Human Body ». Dans 2019 3rd European Conference on Electrical Engineering and Computer Science (EECS). IEEE, 2019. http://dx.doi.org/10.1109/eecs49779.2019.00039.

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Salomo, Jonathan, Eduardus Ariasena, Athaya Syaqra et Salma Majidah. « Holick's Rule Implementation : Calculation of Produced Vitamin D from Sunlight Based on UV Index, Skin Type, and Area of Sunlight Exposure on the Body ». Dans 2021 9th International Conference on Information and Communication Technology (ICoICT). IEEE, 2021. http://dx.doi.org/10.1109/icoict52021.2021.9527498.

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Rusu, Stefan. « Establishing of the mono- and polyinvasion impact on some morpho-functional indices in wild boars ». Dans Xth International Conference of Zoologists. Institute of Zoology, Republic of Moldova, 2021. http://dx.doi.org/10.53937/icz10.2021.44.

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In the paper is described the mono- and poly-invasions impact on some morpho-functional indices in wild boars. So, in result of the investigation of hematological indices in uninfested mono- and poly-parasitized wild boars, it was established that both the indices of hemoglobin content, of hematocrit, erythrocyte’s number, thrombosis time and ESR (erythrocyte sedimentation rate) vary and are more increased in the I group with uninfested wild boars compared to mono - and poly-parasitized ones. It has been established that at infested boars with S. papillosus from the I group, and in those infested with D. lanceolatum from the II group there is a decrease of hemostatic indices, but their maximum decrease is highlighted in the IV group with wild boars infested with Dicrocoelium lanceolatum, Strongyloides papillosus, Metastrongylus elongatus and Eimeria debliecki. This decrease is due to eliminated exotoxins by parasites, which contain anticoagulants and hemolyzers and which neutralize the fibrinogen, thrombin, Ca+ ions and vitamin K properties from the body.
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Eden, Timothy, Jonathan Neville, Shane McAuliffe, Dominic Crocombe et Sumantra Ray. « 22 The influence of body mass index, glycemic control and vitamin D status on outcomes in patients admitted to intensive care with COVID-19 : a single centre retrospective study ». Dans Oral Presentations and Abstracts from the 6th International Summit on Medical and Public Health Nutrition Education and Research, September 2020. BMJ Publishing Group Ltd, 2022. http://dx.doi.org/10.1136/bmjnph-2022-nnedprosummit.28.

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Eden, Timothy, Jonathan Neville, Shane McAuliffe, Dominic Crocombe et Sumantra Ray. « 22 The influence of body mass index, glycemic control and vitamin D status on outcomes in patients admitted to intensive care with COVID-19 : a single centre retrospective study ». Dans Oral Presentations and Abstracts from the 6th International Summit on Medical and Public Health Nutrition Education and Research, September 2020. BMJ Publishing Group Ltd, 2022. http://dx.doi.org/10.1136/bmjnph-2022-nnedprosummit.27.

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Berg, Isaac, Corrine K. Hanson, Harlan R. Sayles, Debra Romberger, Amy J. Nelson, Jane L. Meza, Bruce Miller, Lisa D. Edwards et Stephen I. Rennard. « Vitamin D, Vitamin D Binding Protein, And Airflow In COPD ». Dans American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California. American Thoracic Society, 2012. http://dx.doi.org/10.1164/ajrccm-conference.2012.185.1_meetingabstracts.a3749.

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Opit, Helena V., Djubir R. E. Kembuan et Telly S. Tangkere. « Development of Colocasia Esculenta L. Schott for Snack Food ». Dans Unima International Conference on Science and Technology 2022. Switzerland : Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-kids3s.

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The research used is (Research and Development), Research and Development or R&D. The purpose of this research is to develop taro tubers into a snack. Data collection techniques used in this study were observation, and questionnaires or questionnaires. The data analysis technique in the process of developing taro tuber products uses qualitative methods, based on organoleptic tests. This research was conducted at the PKK Laboratory, Faculty of Engineering, UNIMA. The results showed that taro sponge cake as a snack was favored by respondents, both students and lecturers. From the results of the organoleptic test, it turns out that Taro Sponge Cake, Taste is quite sweet as much as 70%, Texture tends to be quite soft as much as 80%, while Aroma is 80% and the more dominant color is slightly yellow, This shows that the characteristics of the taro sponge cake are: The taste is sweet, the texture is quite soft, the aroma is quite fragrant while the color is slightly yellow. From the results of chemical, physical and microbiological testing, taro cake contains 6 nutrients that are very useful to the human body, such as carbohydrates 10.29%, fat 4.79%, protein 6.49%, calcium 0.01%, vitamin C 3.30% crude fiber 0.89%. The product of taro sponge cake is very good to serve as a snack because it can fulfill the feeling of fullness between lunch and dinner. Thus the nutritional needs of both lecturers and students will be fulfilled and avoid various diseases due to holding back hunger.
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Rapports d'organisations sur le sujet "Vitamin D in the body"

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Chen, HongPeng, et YuQian Zhao. Effects of vitamin D supplementation on body composition, glucose metabolism, and inflammation in obese or overweight patients : a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, mars 2022. http://dx.doi.org/10.37766/inplasy2022.3.0152.

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Janowsky, Esther. Vitamin D and Breast Cancer. Fort Belvoir, VA : Defense Technical Information Center, avril 1997. http://dx.doi.org/10.21236/ada327042.

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Janowsky, Esther. Vitamin D and Breast Cancer. Fort Belvoir, VA : Defense Technical Information Center, juillet 1997. http://dx.doi.org/10.21236/ada334101.

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Janowsky, Esther. Vitamin D and Breast Cancer. Fort Belvoir, VA : Defense Technical Information Center, juillet 1995. http://dx.doi.org/10.21236/ada298702.

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Hansen, Natasha. Vitamin D Deficiency in Athletes. Ames (Iowa) : Iowa State University, janvier 2019. http://dx.doi.org/10.31274/cc-20240624-1591.

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Liu, Tang, Zhimin Yang, Zhihong Li et Xiaolei Ren. Differential Effects of Vitamin D And Active Vitamin D Supplements for Preventing Falls : A Meta-Analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, septembre 2020. http://dx.doi.org/10.37766/inplasy2020.9.0018.

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Balint, Eva. Vitamin D, Breast Cancer and Bone Health. Fort Belvoir, VA : Defense Technical Information Center, octobre 2008. http://dx.doi.org/10.21236/ada499634.

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Feldman, David. Interactions between Vitamin D and Breast Cancer. Fort Belvoir, VA : Defense Technical Information Center, septembre 2008. http://dx.doi.org/10.21236/ada502825.

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Schlichting, Christine L., et David J. Styer. Vitamin D Status of Submariners during Patrol. Fort Belvoir, VA : Defense Technical Information Center, janvier 1989. http://dx.doi.org/10.21236/ada206776.

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Feldman, David. Interactions Between Vitamin D and Breast Cancer. Fort Belvoir, VA : Defense Technical Information Center, juillet 2010. http://dx.doi.org/10.21236/ada537364.

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