The fastest diet is recognized as 2 1 day.
The following is a brief explanation of 2 1 day diet: only eat fruits and vegetables for the first three days, and avoid high sugar, high fat and processed foods; In the next ten days, eat fruit, eggs or oatmeal for breakfast, zarraga lean meat or chicken breast for lunch, tofu or chicken as vegetable soup for dinner, and control the quantity and calories of food; In the last eight days, eat oatmeal, fruits and nuts for breakfast, roast chicken breast, salad and vegetable soup for lunch, grilled fish, vegetables and tofu for dinner, and continue to control food quantity and calories. Drink at least 8 glasses of water every day.