For people who are trying to lose weight, it does not matter if they are counting carbohydrates, protein or fat. All that matters is that they are counting something. That is the finding of the largest-ever controlled study of weight-loss methods published on Wednesday in The New England Journal of Medicine. More than 800 overweight adults in Boston and Baton Rouge, La., were assigned to one of four diets that reduced calories through different combinations of fat, carbohydrates and protein. Each plan cut about 750 calories from a participant’s normaldiet, but no one ate fewer than 1,200 calories a day.

Fewer Calories (Carbs, Protein or Fat) Are Called Weight-Loss Key – NYTimes.com.