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Unlike the other twelve vitamins, vitamin D is only conditionally essential - in a preindustrial society people had adequate exposure to sunlight and the vitamin was a hormone, as the primary natural source of vitamin D was the synthesis of cholecalciferol in the lower layers of the skin’s epidermis, triggered by a photochemical reaction with ...
Vitamin D, often called the "sunshine vitamin," is essential for maintaining healthy bones, supporting immune function and regulating mood. ... Trout is an excellent source of vitamin D, with a 3 ...
Some sources include a fourteenth, choline. [6] Vitamins have diverse biochemical functions. Vitamin A acts as a regulator of cell and tissue growth and differentiation. Vitamin D provides a hormone-like function, regulating mineral metabolism for bones and other organs. The B complex vitamins function as enzyme cofactors (coenzymes) or the ...
These are the biggest sources of vitamin D in food, according to the NIH: Cod liver oil, 1 tbsp, 34 mcg. Rainbow trout, 3 oz, 16.2 mcg. Sockeye salmon, 3 oz, 14.2 mcg.
Calcitriol is a hormone and the active form of vitamin D, normally made in the kidney. [8] [9] [10] It is also known as 1,25-dihydroxycholecalciferol.It binds to and activates the vitamin D receptor in the nucleus of the cell, which then increases the expression of many genes. [11]
Ergocalciferol, also known as vitamin D 2 and nonspecifically calciferol, is a type of vitamin D found in food. It is used as a dietary supplement [3] to prevent and treat vitamin D deficiency [4] due to poor absorption by the intestines or liver disease. [5]
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