Nutrition: Why losing weight isn’t about cutting calories

When it comes to losing weight, we’ve all heard the saying, “Calories in versus calories out.”

Studies show that the brain plays a key role in regulating food intake and weight. When calories are restricted, specific neurons in the brain that control body weight and food intake change. This results in increased hunger and weight gain. The body’s innate ability to self-regulate food intake and weight is a significant cause of weight rebounding after calorie-restriction diets.

During periods of food restriction and weight loss, muscle loss often occurs, further decreasing BMR. Once calorie intake increases, weight gain in the form of body fat occurs. The loss of fat and muscle during times of weight loss and the rebound in body fat during times of normal eating and overeating results in a greater body fat-to-lean muscle ratio over time.

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