Vitamin D is often called the “sunshine” vitamin. It’s been in the news lately because many researchers are concerned about the adequacy and protective factors of the current recommended intake.
First, what is Vitamin D? It’s one of the fat soluble vitamins (the others are A, E and K) found in food or made by the body after exposure to UV rays from the sun. It exists in several forms, each with a different level of activity. The most active form of vitamin D is Calciferol. The liver and kidneys help convert Vitamin D to its active hormone form. So this is how it works:
Vitamin D is …
.produced in the skin or consumed in food
.chemical conversion in the liver and kidney
. forms the physiologically active form called dihydroxyvitamin D which functions as a hormone because it sends a message to the intestines to increase the absorption of calcium and phosphorus. And where is the greatest need for calcium and phosphorous in the body - our bones. Vitamin D plays an important role in helping to form and maintain strong healthy bones.
Why the concern over raising the recommended amount of Vitamin D?
.Lack of sunlight
.Skin color
.Use of sunscreens
.Study results that indicate current levels don’t reduce the risk of fractures. Other studies using increased amounts are showing greater leg strength and better balance, a better immune system and fewer cancers.
Is it a good idea to increase your intake of Vitamin D? As I have said many times in the past you must consult your health professional. There are some concerns about toxicity - and my major concern has to do with our outlook regarding specific supplementation: more has to be better. In this case be aware of proposed suggestions for change but be cautious.
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