Alli is clinically proven to help you lose more weight than dieting alone. The tablet works only in your digestive system to stop about a quarter of the fat in your meals from being absorbed. This fat passes out of your body & may cause changes to your bowel movements. Eat lower fat meals to help manage these effects. Being overweight increases your risk of developing several serious health problems such as diabetes & heart disease. These conditions may not cause you to feel unwell so you should see your doctor for a general health check. The active ingredients (Orlistat) in alli is designed to target fat in your digestive system. It stops about a quarter of the fat in your meals from being absorbed. This fat will pass out of the body in your stools. You may experience diet related treatment effects. It is therefore important that you commit to a lower fat diet to manage these effects. If you do, the action of the tablets will assist your efforts by helping you to lose more weight compared to dieting alone. Each tablet contains ingredients that help alli work efficiently in your digestive system & chewing the tablet releases these substances quickly. So for every 2kg (4lb) you lose from dieting alone, alli chewable tablets can help you lose 1kg (2lb) more. Chew on tablet, three times a day.