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Trout is an excellent source of vitamin D, with a 3-ounce serving providing 645 IU—more than 100% of the daily recommended intake for most adults. This makes it one of the richest natural ...
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 ...
Cholecalciferol is a form of vitamin D which is naturally synthesized in skin and functions as a pro-hormone, being converted to calcitriol. This is important for maintaining calcium levels and promoting bone health and development. [4] As a medication, cholecalciferol may be taken as a dietary supplement to prevent or to treat vitamin D ...
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 ...
The amount of vitamin D needed each day varies from person to person. However, the daily recommended dose to sustain vitamin D levels is 10 micrograms (mcg) for infants and 15 mcg for ages 1 ...
Semi-synthetic "natural source" vitamin E esters, the "natural source" forms used in tablets and multiple vitamins; these are highly fractionated d-α-tocopherol or its esters, often made by synthetic methylation of gamma and beta d,d,d tocopherol vitamers extracted from plant oils.
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