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Learn About Vitamin D3The two most important forms of Vitamin D3 are cholecalciferol (the D3 component of Vitamin D) and ergocalciferol (the D2 component of Vitamin D). Cholecalciferol is manufactured by the skin through exposure to sunlight. This element is necessary for the growth and maintenance of bones and bone density. Vitamin D3 is only produced after the skin has been exposed to ultraviolet rays. Once this occurs, Vitamin D3 goes to the liver where it becomes a more complex form of Vitamin D3 -- 25-Hydroxyvitamin D3. This compound then travels to the kidney, where it is further broken down into a hormone-type substance used in the repair and maintenance of bone tissues. The cholecalciferol component of Vitamin D3 is supplemented during food fortification. Margarine is a food that is fortified with Vitamin D3. In many countries, this is mandatory to ensure that margarine is nutritionally close to butter. Milk is also regularly fortified with Vitamin D3. A 2004 research found that the absorption rates of ergocalciferol and cholecalciferol were fairly equal in healthy people, but that cholecalciferol was 10 times more potent than ergocalciferol and also had longer-lasting effects. The researchers concluded that when using Vitamin D supplements, those containing Vitamin D3 were the most effective. It is advisable to talk to your doctor before taking Vitamin D3 supplementation. Large doses have been known cause kidney failure, and sometimes, death. If you are taking large doses under a doctor's care, monthly blood work is required to prevent Vitamin D3 toxicity. If you have a pre-existing kidney problem, avoid Vitamin D3 altogether. Also Read:
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