Verified
“1,800 mg per serving.”
The panel declares 1,800 mg of glucomannan from konjac root extract per three capsules.
Nutricost Glucomannan 1,800 mg Review
SAC StudioBest Third-Party TestedCONSIDER
7.7/10SAC Product Score™
How the score breaks downHide breakdown
SAC Product Score™ — how it breaks down
- Dose vs the Trials30%8.0
- Label Directions & Safety20%6.0
- Testing & Manufacturing20%8.8
- Formulation & Form15%7.2
- Value15%8.6
Buy it if a printed third-party testing claim is your first filter, and add the missing directions yourself
✓ Buy if…
- You want Third Party Tested printed on the bottle
- You want a fair price for 60 servings
✗ Skip if…
- You are vegan; the capsule is gelatin
- You want the label to carry the choking warning
Read the full analysis
✓ Also buy if…
- You already know how to take glucomannan safely
✗ Also skip if…
- You want pre-meal timing spelled out
Nutricost prints what many budget brands leave to the listing: Third Party Tested, GMP Compliant Facility and Non-GMO are on the bottle itself. Three capsules give 1,800 mg of glucomannan from konjac root extract, 60 servings. The weak side is the directions.
The label says to take three capsules daily with 8-12 oz of water and stops there: no time before a meal, and no warning about choking, which every other capsule here with a readable label carries. The capsule is gelatin, with a rice extract blend and calcium laurate.
How we built the SAC Product Score™ — 7.7/10
Dose vs the Trials30%8/10
1,800 mg of declared glucomannan a day is near the low end of the studied range, taken as one serving with no pre-meal direction.
Label Directions & Safety20%6/10
8-12 oz of water is printed; meal timing is not, and the bottle carries no choking or swallowing warning.
Testing & Manufacturing20%8.8/10
Third Party Tested, GMP Compliant Facility and Non-GMO printed on the label; made and quality tested in the USA.
Formulation & Form15%7.2/10
Gelatin capsule with a rice extract blend and calcium laurate; gluten-free. Not suitable for vegans despite the listing's wording.
Value15%8.6/10
About $0.28 per 1,800 mg serving, among the lower costs per gram for a capsule.
The product at a glance
- Form
- Capsule (gelatin)
- Serving
- 3 capsules
- Count
- 180 capsules (60 servings)
- Per serving
- 1,800 mg glucomannan (from konjac root extract)
- Directions
- 3 capsules daily with 8-12 oz of water
- Other ingredients
- Gelatin capsule, rice extract blend (rice extract, rice hulls, gum arabic, sunflower oil), calcium laurate
- Seals
- Third Party Tested, GMP Compliant Facility, Non-GMO, gluten-free
- Cost per dose
- ~$0.28 per serving
Marketing claims vs. reality
Partial
“Third party tested.”
Printed on the bottle. No lab is named and no certificate is linked, so we can confirm the claim, not the result.
False
“Vegan.”
The listing says vegan. The other-ingredients line on the bottle names a gelatin capsule, misspelled as 'geltain'.
What our test actually found
01A testing claim on the bottle, not just the listing
Third Party Tested and GMP Compliant Facility are printed on the label. That is more than NOW, Nature's Way or Carlyle commit to in print, and it is why this capsule scores highest on testing.
02The missing warning
The suggested use gives a serving and a water volume. There is no timing and no word about choking. For a fiber with documented cases of esophageal obstruction, that omission costs it more than any other single line on the list.
Pros & cons, no sugar-coating
Pros
- Third-party testing printed on the label
- GMP-compliant facility, Non-GMO, gluten-free
- Fair price for 60 servings
- 1,800 mg of declared glucomannan
Cons
- No choking warning on the bottle
- No pre-meal timing in the directions
- Gelatin capsule, although the listing says vegan
Well tested, under-labelled
Nutricost's glucomannan is a sound product let down by its instructions. If you know to take it with a full glass of water before a meal and never dry, it is a fair buy. If you want the bottle to tell you that, NOW and Carlyle do.
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
- Vanderbeek PB, et al. Clin Toxicol (Phila). 2007;45(1):80-2.Vanderbeek PB, Fasano C, O'Malley G, Hornstein J · 2007 · Clinical Toxicology · PMID 17357389
Esophageal obstruction from a hygroscopic pharmacobezoar containing glucomannan
A case report of esophageal obstruction from a glucomannan-containing product; the authors note that the fiber is strongly hygroscopic and expands rapidly to many times its original size.
- Keithley JK, et al. J Obes. 2013;2013:610908.Keithley JK, Swanson B, Mikolaitis SL, DeMeo M, Zeller JM, Fogg L, Adamji J · 2013 · Journal of Obesity · PMID 24490058
Safety and efficacy of glucomannan for weight loss in overweight and moderately obese adults
In 53 overweight and moderately obese adults, 1.33 g of glucomannan with 8 oz of water one hour before each meal for eight weeks was well tolerated but produced no more weight loss than placebo and did not change body composition, hunger or fullness.