The recognized fastest diet is 2 1 day.
Here is a brief introduction to the diet of 2 1 day: only eat fruits and vegetables for the first three days, and avoid high sugar and high fat and processed foods; For the next ten days, eat fruit, eggs or oatmeal for breakfast, zarraga lean meat or chicken breast for lunch, tofu or chicken with 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, and grilled fish, vegetables and tofu for dinner, and continue to control food intake and calories. Drink at least 8 glasses of water every day.