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Vitamin D

Dr. Weil's Vitamin Advisor

Why vitamin D is important
(Article published with the permission of

Six Reasons Why This Vitamin Is So Important

Vitamin D, what have you not done for us lately? The sunshine vitamin, constantly in health news, continually being at the heart of health breakthroughs, and the king of natural supplements, plays six intricate roles in your body. Its functions are essential and, without the vitamin, many bodily processes would cease and many diseases could linger. Let’s take a look at those six important roles:
1. It metabolizes calcium. Vitamin D and calcium are closely linked in your body. Calcium levels are tightly regulated by two hormones — the parathyroid hormone (PTH) and 1,25 dihydroxyvitamin D (1,25 D). When calcium levels drop, PTH rises, which eventually gets calcium back to proper levels. One of the ways it does so is by triggering your kidneys to synthesize 1,25 D. And that increases calcium absorption in the guy and kidney.
2. Your immune system needs it. 1,25 D exerts a variety of effects on your immune system, which has the potential to fight infections and stop a variety of autoimmune disease from developing. These include type 1 diabetes and rheumatoid arthritis. So, your body’s main defense system requires vitamin D to fight.
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