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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 ...
Vitamin D, also referred to as calciferol, is a fat-soluble vitamin available in foods, either naturally or through fortification, and through supplements, according to the National Institutes of ...
Best Vitamin D Supplements. High Potency Vitamin D-3. Over 26,000 customers on Amazon have rated this supplement at 4.8 stars, with some users claiming they saw immediate changes in their overall ...
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 ...
Taking vitamin D supplements has no significant effect on cancer risk. [98] Vitamin D 3, however, appears to decrease the risk of death from cancer but concerns with the quality of the data exist. [99] Nevertheless, studies suggest that Vitamin D deficiency is associated with increased risk of development melanoma. [100]
Vitamin D (the inactive version) is mainly from two forms: vitamin D 3 and vitamin D 2. Vitamin D 3, or cholecalciferol, is formed in the skin after exposure to sunlight or ultra violet radiation or from D 3 supplements or fortified food sources. Vitamin D 2, or ergocalciferol, is obtained from D 2 supplements or fortified food sources. [3]
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