This FDA Approved, over the counter weight loss aid helps prevent fat be absorbed! It helps you lose more than dieting alone. alli® contains orlistat, which helps about 25% of the fat you eat from being absorbed. Let's say you lose 2 pounds. alli® can help you lose one more. It is a weight loss aid for overweight adults that are 18 years and older. You must use along side of a reduced calorie and low-fat diet.alli® Weight Loss Aid Includes: alli® Read Me First Guide, 120 ct bottle (a 40 day supply), and an alli® Companion Guide Book.