(CBS/AP) The Atkins diet may have proved itself after all: A low-carb diet and a Mediterranean-style regimen helped people lose more weight than a traditional low-fat diet in one of the longest and largest studies to compare the dueling weight-loss techniques.

A bigger surprise: The low-carb diet improved cholesterol more than the other two. Some critics had predicted the opposite.

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Have you tried either the Atkins or Mediterranean Diet?

MONDAY, May 19 (HealthDay News) -- Women who want to keep their hearts in tip-top shape face the fewest challenges in Minneapolis, Washington, D.C., and San Francisco.

Those three cities top the list of the 10 most heart-healthy U.S. metropolitan areas for women, a list that's dominated by western communities.

But the list, released Monday by the American Heart Association, also found the 10 metropolitan areas -- mostly in the South and the Midwest -- that spell trouble, with Nashville, Tenn., St. Louis and Detroit deemed the least friendly major cities for women's heart health.