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Cheapest Glucomannan (Konjac Root) on iHerb

Ranked by real cost per 1,000 mg of Glucomannan (Konjac Root) — cheapest value first.

Prices updated Jul 25, 2026 · 7 products · Prices in USD

The priciest option here costs about 425.8× more per 1,000 mg of Glucomannan (Konjac Root) than the best-value pick Nutricost. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 1,000 mg
1
Nutricost, Glucomannan, Unflavored, 17.9 oz (500 g)
Nutricost, Glucomannan, Unflavored, 17.9 oz (500 g)
Nutricost
2,000 mg25026.950.054View on iHerb →
2
Nutricost, Glucomannan Konjac Root Extract, 180 Capsules (600 mg per Capsule)
Nutricost, Glucomannan Konjac Root Extract, 180 Capsules (600 mg per Capsule)
Nutricost
1,800 mg6016.950.157View on iHerb →
3
Life Extension, Easy Fiber, Natural Orange, 5.89 oz (167 g)
Life Extension, Easy Fiber, Natural Orange, 5.89 oz (167 g)
Life Extension
1,000 mg9018.000.200View on iHerb →
4
Absolute Nutrition, Absolutely Full, 120 Capsules
Absolute Nutrition, Absolutely Full, 120 Capsules
Absolute Nutrition
1,000 mg6028.180.470View on iHerb →
5
Emerald Laboratories, Weight Loss Health, 60 Vegetable Caps
Emerald Laboratories, Weight Loss Health, 60 Vegetable Caps
Emerald Laboratories
250 mg6035.962.40View on iHerb →
6
Obvi, Collagen Carb Blocker, 120 Capsules
Obvi, Collagen Carb Blocker, 120 Capsules
Obvi
50 mg3026.2417.49View on iHerb →
7
Nutra BioGenesis, UltraLean, Thermo MAX, 60 Capsules
Nutra BioGenesis, UltraLean, Thermo MAX, 60 Capsules
Nutra BioGenesis
25 mg6034.4922.99View on iHerb →

How we rank Glucomannan (Konjac Root)

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.