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Some Sun Is Helpful

Body uses sunlight to ward off osteoporosis

(HealthDayNews) -- Older people worried about osteoporosis should pay attention to the SPF (sunscreen protection factor) on sunscreens.

Because the body cannot absorb sufficient calcium without vitamin D, a vitamin D deficiency can be a major factor. Vitamin D is made by the skin when it is exposed to sunlight. Sunscreens with an SPF above eight block the ultraviolet wavelengths that convert precursors of vitamin D into the form needed by the body.

Since the body's ability to produce vitamin D from sunlight declines with age, older people are particularly at risk.

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