How Alli Works (How Orlistat Works)
Alli is taken up to three times a day just before meals. Alli works by limiting the ability of lipase, an enzyme in the body that breaks down fat in the digestive tract. Because the fat is not completely broken down by the disabled lipase, the body cannot absorb all the fat ingested during a meal. According to the Alli website, Alli works to prevent about a quarter of the fat eaten from being absorbed. This, in turn, helps aid in reducing caloric intake and promoting weight loss.