Harvard Health Letter

A more D-manding diet

Some experts say we should have a lot more vitamin D in our diets because it's protective against several diseases.

Vitamin D has long been recognized as vital to bone health because the body needs the vitamin to absorb calcium. But research has suggested that it may be good for a lot more than just bones. Ample intake of vitamin D may help fend off a wide range of conditions, including colon cancer, diabetes, and physical weakness in old age.

Meanwhile, another batch of studies has found that many people, especially as they grow older, have low levels of vitamin D in their blood. Our skin has an amazing ability to produce vitamin D when it's exposed to sunlight, but with age, the skin becomes less productive. The problem is made worse by older people spending more time indoors.

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