Personally, I think these external uses are basically ineffective. To lose weight, we should start from a comprehensive perspective: regular diet, regular work and rest, moderate exercise every day, eating before 7 pm, and then don't eat anything before going to bed, you can drink some warm water. In addition, I will give you a little secret recipe for losing weight, which I have used with my friends around me. Very effective: 250 grams of skim yogurt, green tea powder 1 teaspoon, stir well, eat on an empty stomach in the morning, and then drink after eating. Very effective, you can stop when you reach the required weight, but you should continue to maintain a regular diet and schedule.