I have used this product, but I haven't seen it, but there are many reasons why it doesn't work. Because that product may be used every day, and I only use it in the shower for a week, and then I can clean it up. But the effect of external use will certainly not be too obvious. Personally, I think if you want to lose weight, exercise and diet should be combined. Personally, I prefer yoga. Exercise must be aerobic, without strenuous exercise.