How Does Alli Work?

Alli (orlistat) is a non-prescription weight loss medication. It is the only non-prescription weight loss drug approved by the U.S. Food and Drug Administration (FDA). Many people taking Alli may wonder, "How does it work?"
Alli works by decreasing the absorption of fat from your diet. The stomach and intestines have enzymes called lipases that break down fat into smaller molecules, which are then absorbed from your digestive tract. Alli binds to lipases and inhibits their activity, helping to decrease fat absorption. The drug does not have any effect on carbohydrates or protein.
This weight loss medication is approved for adults with a body mass index (BMI) of 27 or greater (see BMI Calculator to find your BMI). It is intended to be used along with a reduced-calorie, low-fat diet. Not only will such a diet help you lose more weight, it will also help prevent many Alli side effects, particularly the side effects that affect the digestive system.
(Click Alli for more information on how Alli works, to learn about the effectiveness of this drug, and to find out what side effects you should look out for while using this weight loss product.)
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