The menu items were the same for each participant, Dr. Bray said, but a participant on the low-protein diet would have gotten more mayonnaise and less tuna in a tuna fish salad, while the high-protein diet was extra tuna with little mayonnaise.

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It wasn't until 2001 that some experts acknowledged that a low-carb, high-protein diet may have merit.

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The low protein-diet group gained about seven pounds, about half the 13.3 pounds added on by the normal protein participants and 14.4 pounds put on by the high protein group.

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Currently, Papalia is keeping close watch on people who are trying the high-protein, low complex-carbohydrate carb diet popularized by Dr. Robert C.

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While I don't advocate an ultra low-fat diet, because fat has more than double the calories per gram of either protein or carbohydrates, it is the simplest way to cut calories.

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