Method 1: Don't eat after noon: Don't eat anything after three in the afternoon. But you can't eat like this when you can, so you can lose several pounds quickly in a week, so 20 pounds a month is not a problem.

Method 2: Don't eat dinner: Eat less dinner every day and list soybean milk as part of three meals. But be sure to be sugar-free. You can also buy a soymilk machine and make it yourself every day, which is convenient and cheap.

Method 3: Apple diet: eat apples for two days in a row, and then eat them normally for three days. In this way, the goal of losing 20 pounds can be achieved in several cycles, and the skin can be tender.