The sunshine vitamin, essential for bones and immunity.
Vitamin D is a fat-soluble vitamin produced by the skin under UVB action. It regulates phosphocalcic metabolism, bone mineralization and modulates the immune system.
Vitamin D3 (cholecalciferol) is synthesized in the skin or provided by food. Activated by the liver then kidneys, it regulates intestinal absorption of calcium and phosphorus. Deficiency (very common) is associated with osteoporosis, depression, infections and certain cancers.
Bone mineralization, calcium regulation, immune modulation, regulation of 200+ genes.
RDA: 600-800 IU/day. In northern countries, autumn supplementation is recommended for most people.
A significant portion of the population is deficient in vitamin D in winter — supplementation is often warranted.
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