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 pick.
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 | Our Pick | 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 |
Registry check · Glucomannan
Does anyone independently verify Glucomannan supplements?
We did not find any of these products in a public registry, and none of the listings names a certification mark. Where a listing names a mark, we say so in the table; where we could not find it in a registry, we say that instead.
The 5 products on this page checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What 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.
Our Picks
Our Pick: Nutricost Glucomannan Powder (500g)
2g per 1 scoop (2g). None stated. $0.10/day. 250 servings per container at $24.99.
The shelf · Glucomannan
The Glucomannan shelf is unusually consistent
Across 5 products from 4 brands, the cheapest day is NOW Foods Glucomannan 575mg (180 Veg Capsules) at $0.09 and the priciest is BulkSupplements.com Glucomannan Powder from Konjac Root (500g) at $0.17, a gap of 1.9×. With prices this close, which of these Glucomannan products has been independently checked matters more than the price.
Method: the 5 Glucomannan products above, compared on label facts, serving size, servings per container, form, price. Not a dosing recommendation.
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.