I bought this with a box of 30 stickers. At first, it was just a navel sticker, which didn't have much effect. Then I put on all the places I want to lose weight. The result is obviously much. This is very safe. You should pay more attention, because Taobao seems to be selling this now, and my friend bought it on Taobao because it was cheap. It didn't work. She was allergic.