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Stroke protection: A little fish helps

Eating as little as one serving of fish per month may reduce a man's risk of certain strokes by 40 percent, a new study finds. Indeed, eating fish more frequently offers no additional benefit, the data suggest.

More than 80 percent of strokes are of the ischemic variety, which means they're caused by blocked blood vessels in the brain. Most of the blockages are caused by clots. Ruptured blood vessels account for the rest, which are called hemorrhagic strokes.

In the new study, Ka He and his colleagues at the Harvard School of Public Health in Boston documented 377 cases of ischemic stroke and 106 cases of hemorrhagic stroke during a 12-year follow-up of nearly 44,000 men participating in a survey of male health professionals. The Harvard researchers correlated the incidence of these different types of stroke with dietary data collected from the volunteers.

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