Will be thin, but eating like this is not really healthy and thin, but by eating compressed biscuits, only the basic energy needed by the body to maintain physical strength is provided, and no nutrition is provided. During these seven days, your own nutrition is maintained by consuming your body's nutritional reserves, which can achieve a temporary weight loss effect, but once you resume your diet, your body will accelerate the absorption of excessive energy and rebound even more. Eating like this for a long time will lead to severe malnutrition and anemia.