If these are the patches you stick on the stomach over the belly button I wouldn't waste your money. I did a lot of research on these when they started to pop up on my FB newsfeed. I have a degree in Biochemistry and am a Science teacher, so have a good background in science. None of them have had any scientific testing carried out. When asked I asked to see the research papers or a link to where the paper was published I was either ignored or told it was to complicated, I then hit them with my Biochem knowledge, and in one case insulted and told to "stop F**king comenting.". I have been blocked by a number of the suppliers from commenting. I have also been successful in getting a number of these adverts removed from FB. One claimed to lower the blood glucose level when the ingredients would actually increase the glucose level.