Atkins, South Beatch, Weight Watchers or Zone?

November 11, 2014 11:21 PM

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If you’re going to go on a diet, you might as well pick one that meets the most basic criteria of actually working. But proving a diet can deliver weight loss over the long term requires reliable data—and lots of it. That’s what Dr. Mark Eisenberg, professor of medicine at McGill University, and his colleagues went looking for. They scoured existing research about Atkins, South Beach, Weight Watchers and the Zone diets to find out which was most effective and which had the most scientifically rigorous proof to back up its weight-loss claims, especially over the long term. Their results were published Tuesday in the journal Circulation: Cardiovascular Quality and Outcomes.

Each year, north Americans spend more than $66 billion on these and other diets in an effort to shed pounds and keep them off. But when the scientists culled they data on these diets, they could find only 12 studies that met criteria for being scientifically sound and well designed. “What is incredi...

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