Leanbean Review: The Glucomannan Dose, the Results and Where It Went

Leanbean is a caffeine-free glucomannan capsule whose one strong point is a full 3 g daily dose of konjac fiber, and on October 14, 2026 its official website no longer sold it. The fiber can help you feel fuller before meals. The trials behind it point to a kilo or so of weight difference at best, not a transformation.

That's the short version. Below is what the label held, what "Leanbean results" can realistically mean, the price math, the availability problem, and what we'd pick instead.

Where Leanbean went: the official site now redirects

Leanbean's official website stopped selling the product when we checked on October 14, 2026. The old address forwarded through a mirror to a countdown page for a product called LeanerBean, which the page describes as inspired by Leanbean. No ingredients, price or launch date were listed.

That page also says the new formula is "scientifically proven to be more effective," with no study named. We'd treat that line as marketing until a trial shows up. Several review sites now describe Leanbean as discontinued, but we couldn't find a statement from Ultimate Life, the UK company behind it, so we're reporting what we saw and no more.

The practical upshot: if you find a bottle from a reseller, check the expiry date and the seal, and know that the money-back terms below were tied to buying direct.

What was in Leanbean, and at what dose

Leanbean's label was built around 3,000 mg of glucomannan per full daily serving, taken as 2 capsules three times a day with a full glass of water before meals. That's the dose we recorded on our Leanbean product card, and it matches the 3 g a day that European regulators accept for a satiety claim. Label versions differ, though: the bottle in our photo says 120 capsules for 1 month, which works out to 4 a day, so check the panel on any bottle you hold.

The rest of the panel, as we recorded it:

• Choline, 82.5 mg. Marketed for normal fat metabolism. Nothing at this dose touches appetite.
• Green coffee bean extract, 40 mg. Below the doses typically used in trials. No added caffeine, though green coffee can carry a little natural caffeine.
• Acai berry extract, 50 mg. An antioxidant with preclinical support only.
• Chromium, vitamins B6 and B12, zinc and a few plant extracts, which third-party reviews list with doses that don't agree with each other.

So Leanbean was really a glucomannan product with extras. If you want the full background on the fiber itself, our explainer on how glucomannan works for hunger covers the mechanism and the safety rule in depth.

Leanbean results: what the glucomannan trials found

Leanbean itself was never tested in a published trial, so any honest answer about results comes from glucomannan trials at a similar dose. Those trials disagree with each other, and the size of the effect is small even where they agree.

• A 2014 meta-analysis of 8 randomized trials in overweight adults found no statistically significant weight difference between glucomannan and placebo (0.22 kg), with stomach discomfort, diarrhea and constipation among the side effects (Onakpoya et al., 2014).
• A 2021 meta-analysis of placebo-controlled trials found glucomannan users ended about 1.27 kg lighter than placebo, which was statistically significant but below the authors' 2.5 kg bar for clinical significance (Bessell et al., 2021).
• A 2023 network meta-analysis of 111 trials put glucomannan at about 1.36 kg of weight loss versus placebo and rated the certainty of that evidence low (Shahinfar et al., 2023).

Fullness is where glucomannan looks better. In a crossover trial of 22 healthy adults, thicker konjac breakfasts slowed stomach emptying, raised fullness ratings and trimmed how much people ate at lunch by a small amount (Shang et al., 2020). A 2026 systematic review reached a similar split: viscosity-driven satiety effects in several studies, but mixed results across designs and some human studies with null findings (Kusuma et al., 2026).

Put together, realistic Leanbean results look like this: you may feel fuller at meals if you take it with plenty of water before eating, and any scale change is likely to be small. Before-and-after photos on reseller pages can't tell you which part came from the capsule and which from the diet that came with it.

Side effects and the water rule

Glucomannan's main safety risk is choking or blockage when a big dose swells before it reaches the stomach, which is why every serving needs a full glass of water. Compressed glucomannan tablets were restricted in some countries for that reason. Capsules taken with water, and never right before lying down, avoid most of the concern.

The common side effects are the usual fiber ones: gas, bloating, and loose stools or constipation, worst in the first week. Fiber can also slow how fast some medicines are absorbed, so space it away from prescriptions and ask your pharmacist if you take anything for blood sugar.

Leanbean price and guarantee

Leanbean cost about $2.00 a day at the last price we recorded, $59.99 for 30 servings. The 90-day money-back guarantee only covered the 4-bottle bundle, and it came with a fee of around $30. A single-ingredient glucomannan capsule like Lipozene ran about $1.00 a serving at half the glucomannan dose, and we compared that fiber-only lane in our Metamucil vs Lipozene breakdown.

Leanbean on our five-axis rubric

Leanbean scores 14 out of 25 on the rubric we use for every product, held back by a single pathway and a heavy routine. Here's how it lines up against the field, scored on the published Crave Crushers methodology:

Axis (out of 5)	Leanbean	Lipozene	Ozzi Crave Crusher
Pathway coverage	2	1	5
Ingredients and dose disclosure	4	3	4
Science	3	2	4
Value	3	4	4
Format and timing	2	2	4
Total	14	12	21

Leanbean earns its points on dose disclosure and on giving glucomannan the full studied amount. It loses them on coverage (fullness is the only job it does well) and on format: 6 capsules a day, timed before three meals, is a hard routine to keep. And a product you can't buy from the maker scores worse on value than any number in a table.

Who Leanbean suited, and who should skip it

Good fit: you wanted a caffeine-free capsule, your problem was big portions at meals, and you were happy to drink a glass of water before each one.

Skip it if: your cravings hit after dinner rather than at meals, you have trouble swallowing, you take blood sugar medication, or you'd rather not chase a product the maker no longer sells. For more caffeine-free options, our ranking of stimulant-free appetite suppressants scores the field on the same terms, and the best over-the-counter appetite suppressant pills list covers the capsule aisle. Browse the rest of the appetite suppressant reviews for single-product deep dives.

The alternative we'd pick

Our pick over Leanbean is the Ozzi Crave Crusher drink, which scores 21 out of 25 on the same rubric. It has six named actives at disclosed doses: 8 g allulose, 500 mg L-lysine butyrate, 500 mg konjac glucomannan, chromium, ursolic acid and African mango. That spreads the work across GLP-1 signaling, blood sugar and fullness instead of leaning on fiber alone, it's caffeine-free, and it's one stick after dinner instead of three pre-meal doses.

Its cons are real. There's no published trial on the finished Ozzi formula, the doses are moderate by design (its 500 mg of glucomannan is a sixth of Leanbean's), some people notice the natural butyrate smell, and it has the highest sticker price per serving in this comparison until you use the bundle or subscription.

Disclosure: Ozzi sponsors Crave Crushers, and we may earn a commission on purchases made through links on this page. Rankings come from the published rubric on our methodology page, and Ozzi's downsides are listed on the same terms as every other product's.

Our verdict on Leanbean

Leanbean was a fairly honest fiber capsule with a fat-burner label on it: the full 3 g of glucomannan, a few small extras, no stimulants, and a routine most people will struggle to keep. Its results ceiling is the glucomannan ceiling, which is better fullness at meals and a small weight difference at most. With the official site now pointing to a different product, we'd skip it, and we'd wait for LeanerBean's actual label before trusting the "proven" line.

For the label checks that apply to every craving product, start with our six checks before you buy a natural GLP-1 supplement.

References

• Onakpoya I, Posadzki P, Ernst E. The efficacy of glucomannan supplementation in overweight and obesity: a systematic review and meta-analysis of randomized clinical trials. Journal of the American College of Nutrition, 2014. PubMed 24533610
• Bessell E, Maunder A, Lauche R, et al. Efficacy of dietary supplements containing isolated organic compounds for weight loss: a systematic review and meta-analysis of randomised placebo-controlled trials. International Journal of Obesity, 2021. PubMed 33976376
• Shahinfar H, Jayedi A, Torabynasab K, et al. Comparative effects of nutraceuticals on body weight in adults with overweight or obesity: a systematic review and network meta-analysis of 111 randomized clinical trials. Pharmacological Research, 2023. PubMed 37778464
• Shang L, Wang Y, Ren Y, et al. In vitro gastric emptying characteristics of konjac glucomannan with different viscosity and its effects on appetite regulation. Food & Function, 2020. PubMed 32869813
• Kusuma RA, Budiono I, Natasyaesa IA, et al. Glucomannan and resistant starch in obesity management: a systematic review of satiety, gut fermentation, and weight-related and metabolic outcomes. Food & Function, 2026. PubMed 42765172
• Leanbean availability: leanbeanofficial.com redirect and the LeanerBean countdown page, checked 2026-10-14. Label, dosing, price and guarantee terms from the Crave Crushers Leanbean product card.