1. Pitaya is a kind of fruit with low calorie and high fiber, so it is deeply loved by dieters. In addition, pitaya is also very effective in preventing constipation. Second, everyone knows the laxative effect of bananas. Insist on eating one or two bananas every day, which will help to expel toxins from the body, shrink the waist and abdomen, glow healthy and beautiful from the inside out, detoxify and lose weight. Third, grapefruit contains extremely low calories. Eating two pomelos a day can achieve a good weight loss effect, because the chemicals contained in pomelos can lower the insulin level, which will force the fat in your body to be converted into energy instead of loose fat.