Sorry about that! "Alli" is a synthetic derivative of lipostatin, a naturally occurring lipase inhibitor ("fat blocker"). It can block the absorption of up to 30% of the fat in each meal. Sounds good, but there's a catch... You HAVE to eat less than 15g fat per meal or you'll experience treatment effects: uncontrollable stools being one.
So, although "Alli" may decrease the amount of fat you can digest, I think the key lesson here is: If you take it, you'd BETTER maintain a healthy amount of
fat intake, or you'll suffer the consequences. A double edged sword if you will.