Actually, there is no scientific basis at all. You don't know what Japanese certification, European certification and Hong Kong certification promote, and you don't know what certification to post casually. You have no idea. You can lose weight by wearing ordinary shoes for an hour every day. The so-called gold content of science and technology is a deceptive trick. Grasp the psychology of losing weight, and then lose weight without taking medicine or walking. Don't forget to lose weight: diet control+exercise!