Partial
“Glucomannan capsules, 2000 mg per serving.”
The front and title say glucomannan; the Supplement Facts panel declares 2,000 mg of konjac root extract, with no separate figure for the fiber itself.
BulkSupplements Glucomannan Capsules 2,000 mg Review
SAC StudioBest Two-Ingredient CapsuleCONSIDER
7.5/10SAC Product Score™
How the score breaks downHide breakdown
SAC Product Score™ — how it breaks down
- Dose vs the Trials30%7.0
- Label Directions & Safety20%6.0
- Testing & Manufacturing20%8.4
- Formulation & Form15%8.6
- Value15%8.2
Buy it if you want a short ingredient line and accept an extract weight instead of a fiber amount
✓ Buy if…
- You want a veg capsule with a single filler
- You value the brand's third-party testing badge
✗ Skip if…
- You want the panel to state glucomannan, as the trials dosed it
- You want timing and a choking warning in the directions
Read the full analysis
✓ Also buy if…
- You are comfortable with an undeclared glucomannan content
✗ Also skip if…
- You want fewer than four capsules a serving
BulkSupplements keeps the capsule simple, hypromellose and rice flour, and the listing carries third-party-tested and cGMP badges. The Supplement Facts panel is where it parts company with the rest of the list: it declares 2,000 mg of konjac root extract per four veg capsules and does not say how much of that is glucomannan. The suggested use shown in the gallery is four capsules with 8-12 oz of water; we found no pre-meal timing and no choking warning anywhere in the listing images. 240 capsules, 60 servings.
How we built the SAC Product Score™ — 7.5/10
Dose vs the Trials30%7/10
The panel declares 2,000 mg of konjac root extract per serving, not a glucomannan amount; the trials dosed glucomannan itself.
Label Directions & Safety20%6/10
The gallery's suggested use gives four capsules with 8-12 oz of water; no meal timing and no choking warning appear in the listing images.
Testing & Manufacturing20%8.4/10
Third Party Tested and cGMP badges in the listing gallery; no lab named on the panel image.
Formulation & Form15%8.6/10
Hypromellose capsule and rice flour only; gluten-free, soy-free and dairy-free, allergens: none.
Value15%8.2/10
About $0.33 per four-capsule serving, mid-pack per gram of extract.
The product at a glance
- Form
- Veg capsule (hypromellose)
- Serving
- 4 capsules
- Count
- 240 capsules (60 servings)
- Per serving
- 2,000 mg konjac root extract (Amorphophallus konjac root)
- Glucomannan content
- Not stated on the panel
- Directions
- 4 capsules with 8-12 oz of water (listing gallery)
- Other ingredients
- Rice flour, hypromellose capsules
- Seals
- Gluten-free, soy-free, dairy-free; third-party tested and cGMP (listing)
- Cost per dose
- ~$0.33 per serving
Marketing claims vs. reality
Partial
“Third party tested.”
Shown as a badge in the listing gallery. No lab is named and the claim is not on the panel image.
Verified
“Gluten free, soy free, dairy free.”
All three marks appear with the panel, and the allergen line reads none.
What our test actually found
01Extract weight is not fiber weight
Konjac root extract is where glucomannan comes from, and a good extract is mostly glucomannan. The panel still declares the extract, which leaves the actual fiber dose to trust. Every other capsule brand on this list prints the glucomannan figure.
02Directions by infographic
The only usage instruction we could find is a listing graphic: four capsules with 8-12 oz of water. There is no label photograph of a caution panel in the gallery, so we could not confirm a choking warning.
Pros & cons, no sugar-coating
Pros
- Veg capsule with one filler
- Third-party tested and cGMP per the listing
- 240 capsules, 60 servings
- Allergens: none
Cons
- Panel declares extract, not glucomannan
- No timing or choking warning shown in the listing
- Four capsules per serving
A clean capsule with an imprecise panel
BulkSupplements makes a tidy two-ingredient capsule and backs it with a testing badge. For glucomannan, though, the dose of fiber and the way you take it are the product, and this listing is vague on both. Choose it for the ingredient line; choose NOW for the label.
Affiliate link — Super Achiever Club earns a small commission at no extra cost to you.
If this doesn’t fit — try these
NOW Glucomannan 575 mg
8.8/101.725 g of glucomannan per three vegetarian capsules, taken once or twice a day before a meal, with the water rule, the timing and the choking caution all printed on the bottle.
See it on the list →NOW Glucomannan Pure Powder
8.7/10Nothing but glucomannan: 2 g per half teaspoon, about 114 servings a jar, at half the cost per gram of any capsule here. It has to be measured, stirred and drunk before it gels.
See it on the list →Nature's Way Glucomannan
8.6/101.995 g of glucomannan per three vegan capsules with only magnesium stearate added, Non-GMO Project Verified, and the fullest choking warning on the list; the smallest bottle and the highest price per gram among the plain capsules.
See it on the list →Sources & further reading
- Keithley J, Swanson B. Altern Ther Health Med. 2005;11(6):30-4.Keithley J, Swanson B · 2005 · Alternative Therapies in Health and Medicine · PMID 16320857
Glucomannan and obesity: a critical review
A critical review concluding that at 2 to 4 g per day glucomannan was well tolerated and produced significant weight loss in overweight and obese individuals, probably by promoting satiety and fecal energy loss, while calling for further safety and efficacy trials.
- Zalewski BM, et al. Nutrition. 2015;31(3):437-42.e2.Zalewski BM, Chmielewska A, Szajewska H · 2015 · Nutrition · PMID 25701331
The effect of glucomannan on body weight in overweight or obese children and adults: a systematic review of randomized controlled trials
A systematic review of six randomized trials found some short-term reductions in body weight in individual adult trials but no favorable effect of glucomannan on body mass index in any trial.