We all know people obsessed with fad diets — no carbs, high-protein, juice cleanses — but it seems it comes down to the simple fact that if you eat too many calories, you will gain weight. A new study says it doesn't matter where those calories come from in your food, if you ingest a high amount of calories, you'll pack on pounds.
Reuters cites a new study where researchers experimented with subjects on various levels of protein in their diets. They found that as calories increased, people on low-protein diets gained less weight overall, but lost muscle and replaced it with fat. High-protein diets added more weight, but subjects also gained lean healthy muscle.