Harvard Men's Health Watch

Do you need more vitamin D?

Research suggests that higher doses of the sunshine vitamin may be good for your health, but it's too soon to be sure.

Vitamin D is needed to maintain strong bones. A flood of recent studies have also hinted that vitamin D may help to prevent a wide variety of health problems—including some of great interest to men, like heart disease and cancer. You clearly need some vitamin D to be healthy but should
you take more?

Right now, it would be premature to double down on vitamin D supplements. "There is a history of individual nutrients, taken at higher doses than obtained from diet alone, looking like the new cure-all, but then the confirming studies don't demonstrate that," says nutrition researcher Howard Sesso, an associate professor of epidemiology at the Harvard School of Public Health. "Experience tells us that we don't really know that it's safe and it works until we do a definitive clinical trial."

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