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Even on sunless days, engaging in cardio keeps vitamin D active and may help slow aging by protecting your telomeres.

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The key to getting vitamin D in winter without using supplements Exercise completely preserved the body’s active form of vitamin D, which plays a key role in supporting bone health, the immune system, ...

Dr David Johnson discusses recent findings indicating that vitamin D deficiency may contribute to the development of various ...

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Have liver or kidney disease. Because the liver and kidneys are important for converting vitamin D to its active form, having chronic liver or kidney disease can increase your risk of a deficiency.

and immune system have vitamin D receptors. The body transports the vitamin to the kidneys and liver, where it converts into an active hormone. In this form, it assists the body in absorbing calcium.