I don't think it's working. To lose weight is simply to control your diet, eat less and eat more meals, and try to be vegetarian. If you have a big appetite, you can have a cup of coffee before meals. Caffeine in coffee can improve a person's basal metabolism. It is found that this improvement is considerable, which may be as high as 1 1%. Now I just drink luckin coffee's small blue cup of coffee every day to keep fit. A month later, I lost almost 6 pounds.