Natrol Vitamin D3, 10,000 IU offers multiple health benefits. Vitamin D3, also known as cholecalciferol, is a form of vitamin D that the body produces when skin is exposed to UV radiation from the sun. It is converted from food sources and sunlight into its active form, calcitriol, by the liver and kidneys. Vitamin D is necessary for the maintenance of healthy calcium and phosphorous levels in the body.
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