Vitamin D: What's Enough? | Science News

Be a Champion for Science

Get your subscription to

Science News when you join.


Vitamin D: What's Enough?

Many people may need much more

5:39pm, October 12, 2004

Second in a two-part series. Part I: "Vitamin Boost" is available at Vitamin Boost.

A few minutes of sun exposure on a summer day can generate huge quantities of vitamin D in a person's body. A cholesterol-like substance in the skin absorbs ultraviolet (UV) energy and creates vitamin D. Then, a cascade of chemical reactions turns vitamin D into a surprisingly versatile hormone—one that has long been recognized to help the body absorb calcium from the diet to build strong bones. Recent work, however, indicates that vitamin D also bolsters muscle strength, insulin action, immune health, and the body's natural defenses against cancer.

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More from this issue of Science News