Alli (orlistat 60 mg) Review 2026: Evidence-first buyers who want an FDA-approved option and can tolerate GI side effects
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Our verdict
Alli earns the top spot not by hype but by data. In a pooled analysis of 16 orlistat trials totaling more than 10,000 participants, orlistat produced about 2.9 kg more weight loss than placebo over a year, and reduced progression to diabetes. It is the only FDA-approved OTC weight-loss aid here, with one labeled active ingredient at a known dose, so you know exactly what you are taking. The trade-offs are real: it works by blocking some dietary fat absorption, which causes oily stools, urgency, and gas, particularly after fatty meals, and the FDA has flagged rare cases of severe liver and kidney injury. The average benefit is meaningful but modest and depends on pairing it with a reduced-calorie, low-fat diet and exercise. For shoppers who value transparency and proven, if unglamorous, results over aggressive marketing, Alli is the most defensible pick in this category by a wide margin.
Score breakdown
- Safety (30%)7.0/10
- Evidence (30%)8.5/10
- Cost & Value (20%)6.5/10
- Transparency (10%)9.0/10
- Support (10%)6.5/10
Scored per our review methodology.
Who it's for
Best for: Evidence-first buyers who want an FDA-approved option and can tolerate GI side effects.
Pricing
About $66 for a 120-capsule bottle (roughly a one-month supply at three capsules per day) at major US retailers
| Plan | Price | Notes |
|---|---|---|
| 120-capsule bottle (refill pack) | About $66 | Roughly a one-month supply at the standard three-capsules-per-day dose; sold at Walmart and other major retailers |
| 60-capsule starter pack | About $35-45 | Smaller trial size; includes a companion guide |
What the evidence says
- In a pooled meta-analysis of 16 orlistat randomized trials (over 10,000 participants), orlistat reduced weight by about 2.9 kg more than placebo over a year and improved several cardiometabolic markers, while increasing GI side effects. (BMJ meta-analysis of long-term anti-obesity pharmacotherapy (2007))
- Orlistat is a lipase inhibitor that blocks absorption of a portion of dietary fat; consumer information details its use, dosing, and common gastrointestinal side effects. (MedlinePlus: Orlistat)
Pros & cons
Pros
- The only FDA-approved over-the-counter weight-loss drug, with a single, clearly labeled active ingredient at a known dose
- Backed by large randomized controlled trials rather than marketing testimonials
- Mechanism is well understood: orlistat blocks a portion of dietary fat from being absorbed
- Sold openly at pharmacies with no auto-ship enrollment or subscription trap
- Modest but real average benefit when combined with a reduced-calorie, low-fat diet
Cons & red flags
- Gastrointestinal side effects are common and often unpleasant: oily stools, urgent bowel movements, and flatulence, especially with higher-fat meals
- Average weight-loss benefit is modest, not dramatic, and only holds up alongside diet and exercise
- Requires taking a low-fat diet seriously or side effects worsen
- Red flag: The FDA has updated Alli's label to warn of rare cases of severe liver injury and acute kidney injury, so it is not risk-free despite OTC status
How it compares
Alli (orlistat 60 mg) scores 7.5/10 in our weight loss evaluation. See where it lands in the full ranking: Best Weight-Loss Supplements of 2026.
- Ro (Ro Body) review — 8.4/10, cash-pay patients who want branded glp-1s at manufacturer direct rates with insurance-coordination help
- WeightWatchers Clinic (WW Med+) review — 8.3/10, insured patients who want hands-on prior-authorization help plus a structured behavioral program
Frequently asked questions
Is Alli FDA approved?
Yes. Alli (orlistat 60 mg) is the only weight-loss aid on this list that is an FDA-approved over-the-counter drug, cleared for adults 18 and older when used with a reduced-calorie, low-fat diet.
How much weight can you lose on Alli?
Modestly more than diet alone. Pooled orlistat trials showed roughly 2.9 kg more weight loss than placebo over a year. Individual results vary and depend heavily on diet and activity.
What are the side effects of Alli?
The most common are gastrointestinal: oily or loose stools, urgent bowel movements, and gas, which worsen with high-fat meals. Rare but serious liver and kidney injury have been reported, so consult a clinician if you have concerns.
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