Not eating for 5 days may lead to weight loss, but it may also lead to weakness in the limbs, mental fatigue, and seriously cause hypoglycemia, hypotension, and even fainting. Not eating for 5 consecutive days, the organism first consumes glycogen reserves in the body, then consumes proteins, and if it still cannot eat, it consumes stored fat in the body, causing weight loss. Although it can make weight loss, but the impact on the organism is also very large, may appear pale, limb weakness, mental lethargy, serious will be low blood pressure, hypoglycemia, mainly manifested as panic, cold sweat, dizziness and headache, but also may cause gastrointestinal tract damage, excessive gastric acid secretion symptoms, such as acid reflux, heartburn, nausea, etc., serious may be impaired consciousness, fainting and so on. Not eating for 5 days is a bad way to lose weight, which has a greater impact on health and is not desirable.