The largest-ever controlled study of weight loss methods has come to a conclusion after two years, and the results speak for themselves: 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.
According to The New York Times, the New England Journal of Medicine study assigned 800 overweight adults one of four diets that cut 750 calories from their typical intake through different combinations of fat, carbohydrates, and protein. Participants consumed at least 1,200 calories a day and after two years, the majority had lost and regained the same amount of weight. The results suggest it's not the diet you choose, but rather your ability to remain committed to it. The study's lead author commented, "It really does cut through the hype. It gives people lots of flexibility to pick a diet that they can stick with."
The lesson, researchers say, is that people lose weight if they lower calories, but it does not matter how.