What Konjac Root Glucomannan Is
Glucomannan is a viscous soluble fibre from the root of Amorphophallus konjac. Appetite Power supplies 1000 mg of konjac root glucomannan per vegan capsule, with 60 capsules per bottle, as a single ingredient.
It absorbs water and forms a gel. That one property is behind every claim made for it, the useful ones and the unsupported ones alike.
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1000 mg per capsule: Single-ingredient konjac root.
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60 capsules: Two months at 1 capsule daily.
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Also called: Konjac, glucomannan, devil's tongue, elephant yam.
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Always with: A full glass of water, every dose.
The full claim map is in our konjac overview.
Supplement Facts
Serving size: 1 Vegan Capsule. Servings per container: 60.
| Amount Per Serving |
Amount |
% Daily Value |
|
Amorphophallus konjac (konjac root, glucomannan) |
1000 mg |
† |
† Daily Value not established.
Other ingredients: Cellulose, Glycerin, Water (vegan capsule)
Directions: One capsule daily, with a full glass of water.
Non-GMO, vegan, gluten free, no additives, no preservatives. Made in the USA.
What the Evidence Shows on Weight
We would rather print the trial than the marketing, because the trial used the exact protocol people are trying to follow.
| Feature |
Detail |
| Participants |
53 adults, BMI 25 to 35 |
| Dose |
1.33 g with 8 ounces of water |
| Timing |
One hour before breakfast, lunch and dinner |
| Duration |
8 weeks |
| Weight change |
0.40 on glucomannan against 0.43 on placebo |
| Hunger and fullness |
No significant difference |
There was no significant difference in weight, body composition, hunger, fullness, lipids or glucose, and it was well tolerated throughout.[1]Safety and efficacy of glucomannan for weight loss in overweight and moderately obese adults — Journal of Obesity (2013) View source Our label directs 1 capsule daily, which is about a quarter of that daily amount. The full reading is in does glucomannan work for weight loss.
Where It Does Work
The evidence for konjac fibre is metabolic rather than slimming, and it is reasonably consistent.
| Outcome |
Evidence |
Result |
| LDL cholesterol |
12 randomized trials, 370 people |
Significantly lower |
| Fasting blood glucose |
6 trials in type 2 diabetes, 440 people |
Down 1.08 |
| 2-hour post-meal glucose |
Same 6 trials |
Down 1.92 |
| Fasting insulin |
Same 6 trials |
Down 1.59 |
| Defecation frequency in children |
3 trials, 122 participants |
Up 1.40 per week |
Konjac glucomannan significantly lowered LDL cholesterol across those 12 trials, 8 in adults and 4 in children.[2]A systematic review and meta-analysis of randomized controlled trials of the effect of konjac glucomannan, a viscous soluble fiber, on LDL cholesterol and the new lipid targets non-HDL cholesterol and apolipoprotein B — The American Journal of Clinical Nutrition (2017) View source The glucose figures come from 6 randomized trials in people with type 2 diabetes.[3]Effects of Glucomannan Supplementation on Type II Diabetes Mellitus in Humans: A Meta-Analysis — Nutrients (2023) View source Both are set out in glucomannan for cholesterol and blood sugar.
How to Use It Safely
The water instruction is not a formality. A fibre that gels on contact with water will gel wherever it is when the water arrives.
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Always: A full glass of water with every capsule.
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Never: Dry, or with a sip.
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Never: Lying down within about 1 hour.
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Stop and seek urgent care: Chest pain or trouble swallowing after.
Amounts and timing are compared in dosage and how to take it.
Safety and Who Should Avoid It
In the 8-week trial, safety outcomes including liver enzymes and creatinine did not differ from placebo. The cautions here are mechanical rather than chemical.
| Situation |
What to do |
| Swallowing difficulty or oesophageal narrowing |
Avoid entirely |
| Previous bowel obstruction |
Avoid entirely |
| Young children |
No konjac jelly or mini-cup products |
| Taking daily medication |
Space by at least 2 hours |
| Type 2 diabetes on medication |
Raise it at your next review |
| Gas or bloating in week 1 |
Common; build up slowly |
The full picture, including the konjac jelly recalls and what they actually concerned, is in side effects and safety.
Capsules, Noodles and Other Fibres
Shirataki noodles are the same glucomannan in food form, and psyllium is the fibre people most often compare it against.
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Capsules: A measured 1000 mg, taken with water.
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Shirataki noodles: Food, with close to 0 calories and no measured dose.
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Psyllium: A larger literature, especially for regularity.
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All 3: Viscous fibres that need fluid.
Those comparisons are in are shirataki noodles healthy and glucomannan vs psyllium and other fibres.
Why Choose Remedy's Appetite Power
One ingredient, a stated amount, and an evidence summary that does not oversell it.
| What you get |
Why it matters |
| 1000 mg konjac glucomannan per capsule |
A stated amount against a studied protocol of about 4 g |
| Single ingredient |
Any effect or reaction traces to 1 thing |
| Vegan capsule |
Cellulose, glycerin and water |
| 60 capsules |
Two months at 1 capsule daily |
| Honest positioning |
Sold on the LDL and glucose evidence, not on a slimming promise |
Frequently Asked Questions
Does glucomannan really work for weight loss? +
In the best-designed trial, no. Over 8 weeks in 53 adults, weight change was 0.40 on glucomannan against 0.43 on placebo, with no difference in hunger or fullness.
What does glucomannan actually do? +
It is a viscous soluble fibre that gels in the gut. Across 12 randomized trials in 370 people it significantly lowered LDL cholesterol.
Is glucomannan like Ozempic? +
No. One is a dietary fibre and 1 is a prescription medicine, and the effect sizes are not in the same range. We sell a fibre and make no drug comparison.
Does glucomannan lower cholesterol? +
Yes, and this is its best-supported use. Twelve randomized trials in 370 people found significantly lower LDL cholesterol.
Does it help blood sugar? +
In type 2 diabetes, 6 trials in 440 people found fasting glucose down 1.08, 2-hour glucose down 1.92 and fasting insulin down 1.59.
How much should I take? +
Our label directs 1 capsule of 1000 mg daily with a full glass of water. The trial protocol used 1.33 g before each of 3 meals.
Why do I need a full glass of water? +
Because the fibre gels on contact with water, and it will gel wherever it is when the water arrives. That is the 1 instruction here that is not optional.
Who should not take glucomannan? +
Anyone with swallowing difficulty, oesophageal narrowing or a previous bowel obstruction. Those are 3 absolute exclusions.
Why is konjac banned in some countries? +
The restrictions concerned konjac jelly mini-cup sweets and choking risk in young children, not konjac as a food or as 1 capsule.
Is glucomannan safe to take daily? +
In an 8-week randomized trial, 0 safety outcomes differed from placebo, including liver enzymes and creatinine. Fluid intake is the part to get right.
Does it cause gas or bloating? +
Commonly in the first 1 to 2 weeks, as with any fibre increase. Starting at 1 capsule and building slowly reduces it.
How long does 1 bottle last? +
Sixty capsules is 60 days at 1 daily. That is about 2 weeks if you reproduce the full 3-dose trial protocol instead.
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