Xenical seperates the fats from the foods that you eat. It teaches you to eat healthy foods that are low in fat. Of course, the fats that are seperated have to come out somehow and I'm sure you can guess how they come out. It's not a pretty picture. Some friends of mine were taking this and quit taking it within the month. They did lost some weight but the "accidents" were not worth it I guess. I thought about trying it but after their experiences, I don't think so.