Very low calorie diets predominantly contain which macro-nutrient?

Very low calorie diets (VLCDs) are specifically designed to induce rapid weight loss by significantly reducing caloric intake, often to less than 800 calories per day. In order to ensure that individuals on these diets retain muscle mass and support metabolic functions despite the extreme caloric deficit, they are typically formulated to be high in protein.

The inclusion of a high protein content helps to minimize muscle loss that usually occurs with significant weight loss, as well as promote satiety, which is essential for adherence to such restrictive eating regimens. This strategy can also aid in preserving lean body mass, which is crucial for maintaining overall metabolic rate. Consequently, while VLCDs may contain smaller amounts of carbohydrates and fats, the predominant macronutrient is indeed protein, aimed at supporting these specific outcomes during weight loss.