Alli (found at Costco) is the generic, over the counter equivalent to Xenical originally made by pharmaceutical company ROCHE. It works by blocking gastric and pancreatic lipases, thus blocking fat/oil absorption.
It is fairly safe, however, must be combined with exercise like anything else. If you don't eat a lot of oily fried foods it may not be of benefit.
If you do, take Alli with caution: what you eat is what you get... gas and oily stools. This should be taken with a vitamin because there are certain vitamins ( A, D , E , K) which are "fat soluble" and need oils to be absorbed in the body.
Good luck!
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