The Importance Of D Vitamin

The D vitamin is really the only vitamin that isn't obtained from foods which are consumed

. Instead, the D vitamin is actually obtained by sunlight over the skin. There has been lots of media coverage about the risks of getting too much sun but it really is crucial that the skin is exposed to sunlight to get the recommended daily allowance of the D vitamin. In reality, the period of time that anyone has to pay in the sun to receive a sufficient dose of the D vitamin is very small and just a couple of minutes each day will be sufficient and not have any adverse effects from the quantity of ultra-violet light received.

The most important function of the D vitamin is to help control how much calcium is absorbed from food. The majority of the calcium is used to create strong teeth and bones but it's also required to send messages along the nerves and to help muscles, such as the heart muscles, to contract. 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's also a contributing factor in reducing the danger of contracting cancer and, in particular, colon cancer.

The variant of the D vitamin that is made under the skin is called vitamin D3, or cholecalciferol. This D vitamin is formed when the ultraviolet in the sunlight reacts with a type of cholesterol that's found under the skin naturally. The D3 is converted into a more active form of the d vitamin within the liver and is then diverted to where it is required the most. A number 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.

Though the bulk of the D vitamin is made through the exposure of the skin to sunlight there are a few foods that do contain some of the vitamin naturally. This kind of the D vitamin is known as vitamin D2, or ergocalciferol. This is used in the exact same way as the other D vitamins and is the sort used to generate the bulk of D vitamin supplements.

The Importance Of D Vitamin

By: Alice Carter

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