Will be thin, but eating like this is not really healthy and thin, but by eating compressed biscuits, it only supplies the basic energy needed by the body to maintain physical strength, but it does not supply nutrition. During these seven days, all of your own nutrition is maintained by consuming the body's nutritional reserves, which can achieve temporary weight loss, but once you resume your diet, your body will accelerate and absorb too much energy, which will rebound even more. If you eat like this for a long time, you will suffer from severe malnutrition and anemia.