Carlyle Glucomannan 2,400 mg Review
#5 of 8 · Best Label Directions✓ Label verified · Supplement Facts read Oct 6, 2026Real retailer photo, cut out. Label unedited.
Buy it if you take other medications and want the label to tell you how to space them. No other bottle here prints the medication gap or the not-before-sleep rule, and both matter for a fiber that swells and slows absorption.
$18-20~$0.38 per 4-capsule serving (2,400 mg)
Why It Scores 8.3 — And The Label Line Behind Each Number
Dose vs the Trials
30% of score2,400 mg of declared glucomannan a day is within the 2 to 4 g range, delivered as one four-capsule serving rather than split before meals.
- Per serving
- 2,400 mg glucomannan (from konjac root)
Label Directions & Safety
20% of scoreWater, timing, choking notice, a not-before-sleep rule and a 1.5-hour gap from medications: the most complete label of the eight.
- Directions
- 4 capsules daily with at least 8 ounces of water or other fluid, 30 to 60 minutes before or with a meal
Testing & Manufacturing
20% of scorePackaged and lab tested in the USA and a GMP mark on the label; no third-party lab named.
- Seals
- Non-GMO, GMP, packaged and lab tested in the USA
Formulation & Form
15% of scoreGelatin capsule with rice powder and vegetable magnesium stearate; non-GMO and free of gluten, soy and artificial colors.
- Form
- Quick-release capsule (gelatin)
- Other ingredients
- Gelatin capsule, rice powder, vegetable magnesium stearate
Value
15% of scoreAbout $0.38 per 2,400 mg serving, among the lower costs per gram for a capsule.
- Serving
- 4 capsules
- Count
- 200 capsules (50 servings)
- Cost per dose
- ~$0.38 per serving
Label verified. Every figure read from the Supplement Facts photo, Oct 6, 2026.
Marketing Claims Vs. Reality
2400 mg per serving.
The panel declares 2,400 mg (2.4 g) of glucomannan per four quick-release capsules.
Non-GMO and gluten free.
Both are printed on the label along with a longer free-from list.
Laboratory tested.
The label says packaged and lab tested in the USA. That is the brand's own statement; no independent lab is named.
What Our Test Actually Found
The only label that mentions your other pills
Viscous fiber can slow the absorption of medication taken alongside it. Carlyle is the one bottle here that says so and gives a number: keep 1.5 hours between them.
A big single serving in gelatin
Four capsules at once is the largest serving on the list, and the gelatin shell rules it out for vegetarians. Splitting it two and two before meals is closer to how the trials dosed.
Full analysis: all pros & cons (7), buy if / skip if
- Most complete directions and safety notice
- Medication-spacing guidance printed
- 2,400 mg of declared glucomannan per serving
- Low cost per gram for a capsule
- Gelatin capsule
- Four capsules per serving
- Testing is the brand's own statement
- You take prescription medication and need spacing guidance
- You want the fullest directions on the bottle
- You are fine with gelatin
- You are vegetarian or vegan
- You want a serving smaller than four capsules
- You want a named third-party lab
No other bottle here prints the medication gap or the not-before-sleep rule, and both matter for a fiber that swells and slows absorption. The dose is on the high side of the studied range in a single daily serving of four capsules, the shell is gelatin, and the testing statement is the brand's own. Per gram it is among the cheaper capsules.
Carlyle's label reads like it was written by someone who has taken the product. Four quick-release capsules, 2,400 mg of glucomannan from konjac root, with at least 8 ounces of water or other fluid, 30 to 60 minutes before or with a meal. Then the notice: inadequate fluid may cause choking, do not take it if you have difficulty swallowing, do not take it before sleeping, and because fiber can affect the absorption of medications, do not take it within 1.5 hours of them. The capsule is gelatin with rice powder and vegetable magnesium stearate; 200 capsules, 50 servings.
The best-written label, in a gelatin shell
Carlyle earns its place on directions. If you are on medication, or simply want a bottle that tells you everything, it is the careful choice. Vegetarians and anyone wanting an independent testing claim should look two places up the list.
If This Doesn’t Fit — Try These
01NOW Foods 575 mg
If you want to try glucomannan the way it was studied, this is the bottle that tells you how.
02NOW Pure Powder
If you are disciplined about stirring half a teaspoon into a full glass of water and drinking it straight away, NOW's powder gives you the studied fiber for pennies.
03Nature's Way 1,995 mg
Nature's Way gets the dose, the directions and the warning right and adds almost nothing to the fiber.
Quick Answers
Can I take glucomannan with my medication?
Fiber products may affect how medications are absorbed. Carlyle's label says not to take it within 1.5 hours of taking medications; ask your pharmacist if you take anything with a narrow dosing window.
Why should glucomannan not be taken before sleeping?
Carlyle's notice says not to take it before sleeping. Glucomannan swells with fluid, and lying down soon after swallowing it raises the chance of it lodging in the esophagus.
Sources & Further Reading
2 peer-reviewed sources, each linked to PubMed
- [1] Henry DA, et al. Br Med J (Clin Res Ed). 1986;292(6520):591-2. PMID 3004635 — Glucomannan and risk of oesophageal obstruction. A British Medical Journal report on the risk of oesophageal obstruction with glucomannan, the reason labels now tell users to take it with plenty of water.
- [2] Keithley J, Swanson B. Altern Ther Health Med. 2005;11(6):30-4. 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.
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