When the storage of glucose is exhausted, protein can't be converted well. The rapid loss of glycogen and muscle means a lot of water loss. So the rapid weight loss a few days ago is actually the loss of water in the body. It's normal to lose a few pounds in the first few days. Hunger makes your brain think you are starving. To protect yourself, it starts to lower your metabolism.
Muscle is an important part of normal metabolism, and it will also reduce your overall metabolism because of rapid loss. This hunger will lead to a mental breakdown of dieters and affect the brain to release the signal of dieting again. It is easy to overeat, and the body can madly absorb sugar and water to maintain life energy because of its lack of ability for too long, but its muscle and metabolic ability are not very good, so its weight will rise.
It may also happen that most people gain weight after dieting, which leads to more and more fat, lower metabolic capacity and less muscle. For women, if they go on a long-term diet, their metabolic ability will decrease, their immunity will decrease, their faces will turn pale, their blood sugar will drop, their blood pressure will drop, and menstruation will disappear. Even serious people will have mental problems such as anorexia or overeating. To sum up, dieting, a simple and rude way to lose weight, is said to be caused by a series of problems and make the body lose a few pounds. If there is no scientific basis, it will also damage health, and the disadvantages will outweigh the benefits. Therefore, if you want to lose weight healthily, you must adjust your daily life habits, combine work and rest, diet structure, participate in moderate exercise and improve your metabolic ability.