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from http://www.webmd.com/heart-disease/n...-flow-to-heart

Jan. 22, 2009 -- Reducing the salt in your diet can help lower your blood pressure, but it may also lower your risk for having a heart attack or stroke in another important way.

Results from a new study suggest that eating a low-sodium diet can also help keep blood vessels working properly.

The study measured the impact of salt restriction on the endothelium, the thin layer of cells that line the interior of the blood vessels and help regulate blood flow.

Overweight and obese study participants with normal blood pressure who restricted the sodium in their diets showed evidence of improved endothelial function compared to participants who did not restrict salt.

The improvement appeared to be unrelated to the impact on blood pressure, suggesting that salt restriction is independently protective of blood vessel function.

"We found that if we reduced the salt in the diet, we saw a direct, positive impact on blood vessels," nutrition researcher and study co-author Jennifer B. Keogh, PhD, tells WebMD."