Calcium Food

The D vitamin is the only vitamin that is not obtained from foods that are consumed. There has been many media coverage about the dangers of getting too much sun but it is essential that the skin is exposed to sunlight to obtain the recommended daily allowance of the D vitamin. The most important function of the D vitamin is to help control how much calcium is absorbed from food. It is the D vitamin that ensures that there is always sufficient calcium in the blood to perform these tasks. Other functions that require the D vitamin relate to the immune system and it is believed that it is also a contributing factor in reducing the risk of contracting cancer and, in particular, colon cancer. The variant of the D vitamin that is formed under the skin is classified as vitamin D3, or cholecalciferol. This D vitamin is created when the ultraviolet in the sunlight reacts with a type of cholesterol that is found under the skin naturally. Some of the D vitamin remains in the liver and kidneys to help reabsorb the calcium from the blood. The rest of the D vitamin is dispersed to the bones to help them retain their calcium and the intestines to aid absorption of calcium from food. Even though the majority of the D vitamin is formed through the exposure of the skin to sunlight there are a few foods that do contain of the vitamin naturally. This form of the D vitamin is classified as vitamin D2, or ergocalciferol.

0 comment :: Post a comment