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Observations

Observations

Opinion, arguments & analyses from guest experts and from the editors of Scientific American

Health

Another reason vitamin D is important: It gets T cells going

Vitamin D deficiency has been linked to a rapidly expanding inventory of ailments—including heart disease, cancer and the common cold. A new discovery demonstrates how the vitamin plays a major role in keeping the body healthy in the first place, by allowing the immune system's T cells to start doing their jobs. 

In order for T cells to become active members of the body's immune system, they must transition from so-called "naive" T cells into either killer cells or helper cells (which are charged with "remembering" specific invaders)...

March 7, 2010 — Katherine Harmon

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