Best Glucomannan Supplements 2026: Cost per Effective Dose
Top pick for Glucomannan: Nutricost Glucomannan Powder (500g) — 2g per 1 scoop (2g), None stated, $0.10/day. Our best-value pick.
Registry check · Glucomannan
Does anyone independently verify Glucomannan supplements?
We could not confirm a single one of these 5 products in any registry, and none of them claims otherwise. Not one brand here displays a certification mark, so on independent verification all 5 start level.
5 checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What 5 Glucomannan labels show
Priced per day, these glucomannan products run $0.09 to $0.17 , across 4 brands.
Which row that favours is not obvious: NOW Foods NOW Foods Glucomannan 575mg (180 Veg Capsules) is cheapest per serving at $0.09, but its serving sits below the median here, so part of that price gap is simply a smaller capsule.
All Glucomannan Supplements Compared
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labelled) | Pick | Buy |
|---|---|---|---|---|---|---|
| NOW Foods Glucomannan 575mg (180 Veg Capsules) | NOW Foods | 575mg / 1 capsule (575mg) | $0.09 | None stated | Buy | |
| Nutricost Glucomannan 1,800mg per Serving (180 Capsules) | Nutricost | 600mg / 1 capsule (600mg) | $0.09 | None stated | Buy | |
| Nutricost Glucomannan Powder (500g) | Nutricost | 2g / 1 scoop (2g) | $0.10 | None stated | Best Value | Buy |
| Nature's Way Glucomannan 665mg, Konjac Root (100 Capsules) | Nature's Way | 665mg / 1 capsule (665mg) | $0.13 | None stated | Buy | |
| BulkSupplements.com Glucomannan Powder from Konjac Root (500g) | BulkSupplements.com | 2g / 1 scoop (2g) | $0.17 | None stated | Buy |
In-Depth Glucomannan Guides
Go deeper on glucomannan — by goal, by form, and what the evidence actually supports:
Our Picks
Best Value: Nutricost Glucomannan Powder (500g)
2g per 1 scoop (2g). None stated. $0.10/day. 250 servings per container at $24.95.
The shelf · Glucomannan
The Glucomannan shelf is unusually consistent
Across 5 products from 4brands, the cheapest day is NOW Foods Glucomannan 575mg (180 Veg Capsules) at 9¢ and the dearest BulkSupplements.com Glucomannan Powder from Konjac Root (500g) at 16¢ — a gap of 1.8×, where categories on this site routinely run 15× or worse. With Glucomannan priced this tightly, the 4-brand question of who will verify their contents decides more than the price column does.
Method: the 5 Glucomannan products above, compared on label facts — serving size, servings per container, form, price. Not a dosing recommendation.
The evidence · Glucomannan
What the published reviews of Glucomannan concluded
- Effect of glucomannan on functional constipation in children: a systematic review and meta-analysis of randomised controlled trials. · Asia Pacific journal of clinical nutrition, 2017
“Glucomannan moderately increases the defecation frequency of children with constipation but is not associated with a reduction in stool consistency or overall improvement in the rate of successful treatment.”
- The effect of glucomannan supplementation on lipid profile in adults: a GRADE-assessed systematic review and meta-analysis. · BMC cardiovascular disorders, 2024
“Glucomannan supplementation has a beneficial effect on the level of TC and LDL-C.”
- 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
“The evidence from available RCTs does not show that glucomannan intake generates statistically significant weight loss. Future trials should be more rigorous and better reported.”
- Effect of glucomannan on plasma lipid and glucose concentrations, body weight, and blood pressure: systematic review and meta-analysis. · The American journal of clinical nutrition, 2008
“Glucomannan appears to beneficially affect total cholesterol, LDL cholesterol, triglycerides, body weight, and FBG, but not HDL cholesterol or BP.”
Method: PubMed searched in humans for systematic reviews and meta-analyses with Glucomannan in the title; these 4 of the 5 that qualified are shown with the authors’ own conclusion quoted rather than summarised. What it cannot tell you: whether Glucomannan will work for you — each of these reports an average across trials published 2008–2024, and null findings are shown here as readily as positive ones.
How these 5 Glucomannan products were ranked
Not one of these 5 glucomannan products could be confirmed in the NSF, USP or Informed Sport registries, so verification separates none of them and the ranking falls to cost per day at the labelled serving. Commission does not enter it: the rate is the same whichever glucomannan you buy. Full methodology.