Definition: Alli is the first -- and thus far only -- FDA-approved over-the-counter weight loss pill. Alli capsules prevent the body from absorbing some of the fat its users consume. Alli's active ingredient attaches to enzymes in the digestive system, preventing the absorption of about 25% of dietary fat consumed. The undigested fat passes through the digestive system and out of the body, and is therefore not absorbed. A low-fat, calorie-controlled diet should be followed in conjunction with the use of the Alli weight loss pill.
Also Known As: orlistat
Common Misspellings: ally
Examples: April decided to use the Alli weight loss pill in addition to following a diet that contains no more than 30% of its calories from fat.
