doi:DOI: 10.1016/B978-0-12-362875-6.50012-9Michael F. Holicknutrition & agingHolik, M. F. (1986a). Vitamin D synthesis by aging skin. In M. L. Hutchinson & H. N. Munro (Eds.), Nutrition and Aging (pp. 45–58 ). Orlando, FL: Academic Press....
The major cause of this Vitamin D deficiency is inadequate exposure to sunlight. Wearing sunscreen with a SPF of 30 reduces Vitamin D synthesis in your skin by more than 95%.[i]Working and living indoors in our modern world contributes to this problem. Those with a naturally dark skin tone...
Vitamin D, often referred to as the “sunshine vitamin,” plays an instrumental role in maintaining our overall health. While many vitamins are derived from the foods we eat, vitamin D is unique because our bodies produce it in response to sunlight exposure. However, during the darker winter ...
Muscle cells contain vitamin D receptor and several studies have demonstrated that serum 25(OH)D is related to physical performance. The active metabolite 1,25(OH)2D has an antiproliferative effect and downregulates inflammatory markers. Extrarenal synthesis of 1,25(OH)2D occurs under the influence...
In the industrial synthesis products, vitamin D3 is more. Vitamin D3 is sensitive to light and can be damaged by minerals and oxidation. But vitamin D3 has good stability after esterification and coated by gelatin, sugar and starch. The activity of vitamin D3 is also represented by Internati...
vitamin D2 which is also called as calciferol or ergocalciferol. Therefore, ergosterol is also called as original vitamin D2; the other is from that the human body can convert the cholesterol to the 7-dihydro-cholesterol to be stored in the skin with the later being able to be converted ...
Taking medications that affect vitamin D synthesis or degradation (such ascarbamazepine,efavirenz,phenobarbital,phenytoin,primidone,rifampin). What are the symptoms of vitamin D deficiency? Symptoms of vitamin D deficiency are initially vague, and most people do not realize they are deficient unless thei...
Vitamin D is classified as an immunomodulatory hormone that is synthesized because of skin exposure to sunlight. It is known to come into play during the regulation of hormone secretion, immune functions, cell proliferation, and differentiation. Its defi
Vitamin D3 is formed in the skin upon exposure to ultra- violet light exposure;19 vitamin D3 is also acquired through dietary supplementation along with vitamin D2 with the amount of this supplementation generally the source of lingering controversy.1,20–22 Since we are largely a society that...
Synthesis Vitamin D Levels and Vitamin D Deficiency. Is There Really a Pandemic? Modifying Factors Functions of Vitamin D: Regulation of Bone Metabolism and Other Pleiotropes Vitamin D and Skin Disease Vitamin D Supplementation in Patients on Long-Term Treatment with Systemic Corticosteroids Conclusion...