A study published in the Archives of Internal Medicine divided a group of 106 overweight and obese people into two groups: About half spent a year following a diet low in fat – say goodbye to steak and pastries – and high in carbohydrates. The other half went for a year on a low-carb, high-fat diet – have a burger, but skip the bun. In both groups, people lost an average of 30 pounds each.

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