For 7 days, if you don't understand whole grains, you just don't eat staple food, and then drink more water during 7 days. When I am hungry, I can eat fruits and vegetables. If I am hungry, I recommend cucumbers, cucumbers, tomatoes and apples, but I should not eat more and drink more water. Keep a certain amount of exercise every day and don't be greedy, otherwise it won't work. The road to losing weight is always hard, so come on!