You can lose weight, but the effect is not great for seven days, because there is more water. . After seven days, the fat drops faster, which is commonly known as avoiding the valley with clear water. . A person's body is like a warehouse. Getting sick from the mouth, you can only drink water but not eat, which is equivalent to a general cleaning of the warehouse. You can eat vegetables, fruits and vitamins on the way. If you lose 30 Jin a month, your body will replenish 10 Jin of water after eating again. .