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Health Library > Health Centers > Weight Loss Center


how does it work?
alli

alli blocks 25% of the fat you eat
Typically, enzymes in your intestines break down fat from food so your body can absorb the fat. But, the active ingredient in alli attaches to some of these enzymes and prevents them from digesting about a quarter of the fat you eat. Because undigested fat can't be absorbed, it passes out of your body naturally.

does alli have side effects?
The main side effect occurs when you eat a meal with too much fat while taking alli. If so much fat is blocked that your stool can't absorb it, you might have side effects. Because they are not harmful, we call them "treatment effects." These include loose or more frequent stools, an urgent need to go to the bathroom, or gas with an oily discharge. The excess fat that passes out of your body is in no way harmful. In fact, you may recognize it as something that looks like the oil on top of a pizza. Treatment effects can be lessened if you stick to reduced-calorie, low-fat meals that average 15 grams of fat per meal.

Fat Comparison Chart

important usage information

  • Don't use alli if you are pregnant or breastfeeding, if you have had an organ transplant, or if you are taking cyclosporine.
  • Do not take alli if you are allergic to any of the ingredients in alli capsules.
  • Ask a doctor before using alli if you are taking warfarin.
  • Do not take alli if you are not overweight.
  • You can take up to three alli capsules per day, one with each meal containing fat.
  • Take a multivitamin daily while taking alli capsules to ensure adequate absorption of vitamins A, D, E, K and beta carotene.
got questions about alli? get honest answers to your questions.
watch alli in action play video

to learn more about how alli works, visit myalli.com

Get details on ordering alli

what is alli? | how does it work? | what's the plan? | are you ready? | what should you eat?

BackReturn to Weight Loss Center Home

got questions about alli? get honest answers to your questions. how does the alli program work? is alli safe? what about treatment effects? what can I eat on the alli program? view all questions

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