Download vitamin d2 50 00010/10/2023 ![]() As previously mentioned, it is also produced by sunlight reacting with a compound in human skin.įor more sources, there is a list of vitamin D rich foods here. Vitamin D3 is available from certain animal foods such as oily fish and egg yolks, and it is also available as a supplement. We can obtain vitamin D2 from mushrooms that have been exposed to UV light, fortified foods such as milk, and vitamin D2 supplements. Calcitriol is the hormonal (and most active) form of the vitamin ( 9, 10). In the liver, both D2 and D3 are metabolized into 25-hydroxyvitamin D, also known as 25OHD or calcifediol ( 9).Ĭalcifediol is the form of vitamin D found circulating in the blood, but it can also undergo a further reaction in the kidney, which produces calcitriol. ![]() Once ergocalciferol and cholecalciferol are produced, they are taken to the liver and then the kidney to undergo enzymatic reactions. For this reason, 7-DHC is sometimes called provitamin-D3 ( 8).
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