How Effective Are Very Low-Calorie Diets?
A very low-calorie diet may allow a severely to moderately obese person to lose about 3 to 5 pounds per week, for an average total weight loss of 44 pounds over 12 weeks. Such a weight loss can improve obesity-related medical conditions, including diabetes, high blood pressure, and high cholesterol. However, VLCDs are no more effective than more modest dietary restrictions in the long-term maintenance of reduced weight. Combining a VLCD with behavioral therapy and exercise may increase weight loss and help keep it off for the long-term. Behavioral therapy helps you to recognize what causes you to overeat so that you can consciously change those behaviors.