Best Glucomannan Supplements 2026: Cost per Effective Dose
Top pick for Glucomannan: Nutricost Glucomannan Powder (500g) — 2mg per 1 scoop (2g), None stated, $0.10/day. Our best-value pick.
All Glucomannan Supplements Compared
All 5 products sorted by cost per labelled serving (lowest first). Dose, certification, and pricing verified against NIH DSLD and manufacturer data.
Read the dose column before the price column. Servings in this category are not equivalent — they range from 575 to 2,000 mg per serving. A lower cost per day here can simply mean a smaller serving, so the cheapest row is not automatically the best value.
| Product | Brand | Dose / Serving | Cost / Day | Certification | 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 | 2mg / 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 | 2mg / 1 scoop (2g) | $0.16 | 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)
2mg per 1 scoop (2g). None stated. $0.10/day. 250 servings per container at $24.95.
How We Rank Glucomannan Supplements
Every product is evaluated on three criteria:
- Cost per day. Not cost per pill or cost per bottle — what it actually costs per day at the product's labelled serving. Where a category's servings differ in strength we flag it above the table, because cost per day is only comparable when the doses are.
- Third-party certification. USP Verified, NSF Certified for Sport, and ConsumerLab Approved indicate independent testing for purity, potency, and contaminants.
- Bioavailable form. We prioritize products using the specific chemical form shown to be most effective in published research.
Rankings are not influenced by affiliate commissions. We earn the same commission regardless of which product you choose. Read our full methodology.
Personalize Your Glucomannan Choice
Not sure which glucomannan supplement is right for you? Use our free tools:
- DNA Supplement Analyzer — upload 23andMe or AncestryDNA data to check for genetic variants affecting glucomannan metabolism. Runs entirely in your browser.
- Lab Results Interpreter — enter your blood test values to get personalized dosing recommendations.
- Supplement Stack Builder — build a complete protocol based on your age, sex, medications, and goals.
- Supplement Audit — already taking glucomannan? Check if you have the right form and dose.