temp1234 wrote:
Yes, I agree that calorie intake needs to be lower than what you burn to lose weight. However, I believe that carbs are the main contributor to weight gain. Consuming little carbs definitely helps lose weight.
Calories are the main contributor to weight gain, as you say in your first sentence. It doesn't matter whether the calories come from carbs, protein, or fat. If you consume more calories than you burn, you will gain weight.
Look at someone who eats mostly salad (without dressing) and steamed vegetables. They would probably lose weight and stay at a healthy weight, even though almost everything they consume is carbs. Those foods have little or not protein or fat in them, they are just carbs.