Ingredient profile
Konjac Glucomannan Fiber: What It Is and What Studies Found
Konjac glucomannan is a thick, soluble fiber from the root of the konjac plant. The Mindcept sales page names it with no amount, and the supplied label pictures list no ingredients. Studies looked at weight and blood sugar, not memory. An analysis of eight weight trials found no significant loss versus placebo.
- FormCapsules, 30 per bottle (label)
- Label servingNot printed on the supplied images
- Sold byUSA Authorized Mindcept Retailer
Written by the Mindcept label deskUpdated
The basics01
What is konjac glucomannan?
Konjac glucomannan is a soluble fiber from the root of the konjac plant. It is highly viscous, which means it soaks up water and turns thick and gel-like (Keithley 2005, Glucomannan: a critical review).
That thickness is why researchers studied it for fullness and for how food moves through the gut. Fibers like this are also fermented by gut bacteria.
The Mindcept sales page names konjac glucomannan and gives no amount. The supplied label pictures show only the bottle front, so they list no ingredient. We cannot say how much of it a capsule holds.
| Name on the sales page | Konjac Glucomannan |
|---|---|
| What it is | A soluble, thick-forming fiber from the root of the konjac plant |
| Place on the sales page | 4 of 4 names, in the sales-page order |
| Amount printed | Not printed on the supplied label or the sales page |
| Daily Value | Not printed |
| Amount used in research | 2 to 4 g a day in the weight studies reviewed; an 8-trial analysis found no significant weight loss; an 11-trial analysis found about 7 mg/dL lower fasting glucose that was not robust |
| How it compares | No amount is printed, so no comparison with a study amount can be made |
| Strength of evidence | Weak for memory: studied for weight, blood sugar and cholesterol, none for memory |
| Marketed or traditional use | Marketed as a fullness and digestion fiber |
| Main caution | Stomach upset (discomfort, diarrhea, constipation) was reported in trials. A thick fiber can change how fast other medicines are absorbed, so ask your pharmacist about timing. |
Weight studies02
Does glucomannan fiber help weight loss?
An analysis of eight trials found no statistically significant weight loss compared with placebo. The average difference was 0.22 kg, and the range included zero (Onakpoya 2014, Glucomannan and weight (meta-analysis)).
The trials enrolled people who were overweight or obese. Side effects included belly discomfort, diarrhea and constipation. A review of older work said 2 to 4 g a day was well tolerated, and it asked for more research on safety and effect (Keithley 2005, Glucomannan: a critical review).
| Question | Source finding |
|---|---|
| Weight, 8 trials | -0.22 kg versus placebo; not significant |
| Amount in the reviewed studies | About 2 to 4 g a day |
| Reported side effects | Discomfort, diarrhea, constipation |
| Memory outcome | None measured |
Mindcept prints no amount, so it cannot be compared with 2 to 4 g.
Blood sugar studies03
What does konjac fiber do to blood sugar?
A 2026 analysis of 11 trials found fasting glucose about 7 mg/dL lower with glucomannan, but the result did not hold under a second statistical method (Jazinaki 2026, Glucomannan and cardiometabolic markers).
The same analysis found no significant change overall in blood fats, body measures or blood pressure. Some subgroup results at higher doses are only ideas to test. No trial measured thinking or memory.
So the honest summary is mixed. It may be a hint for some people with insulin resistance, and it is not firm evidence. It tells us nothing about Mindcept.
- Memory trial: Yes, one
Spermidine
- Studies measured
- Memory test after 12 months (100 adults with memory worries)
- What they found
- No change in the main memory test; small hints on verbal memory and inflammation that the authors say need testing again (Schwarz 2022, Spermidine in older adults (RCT))
- Memory trial: None found
Konjac glucomannan
- Studies measured
- Body weight (8 trials), blood sugar and lipids (11 trials)
- What they found
- No significant weight loss versus placebo; the blood sugar drop was not robust (Onakpoya 2014, Glucomannan and weight (meta-analysis)) (Jazinaki 2026, Glucomannan and cardiometabolic markers)
- Memory trial: None found
L-arabinose
- Studies measured
- Blood sugar and insulin after a sucrose drink
- What they found
- Lower, later glucose peak after a sugar drink; no change when added to mixed meals (Pasmans 2022, L-arabinose with sucrose (RCT)) (Halschou-Jensen 2015, L-arabinose in mixed meals)
- Memory trial: None found
Baobab fiber
- Studies measured
- Hunger after one smoothie; glucose response in healthy adults
- What they found
- Lower hunger ratings after one smoothie; calorie intake at the next meal did not differ (Garvey 2017, Baobab and hunger) (Pfukwa 2026, Baobab fruit pulp (review))
Each card is about the single ingredient, not about Mindcept. No source found tests Mindcept itself, and the sales page prints no amounts to compare.
Safety04
Is konjac glucomannan safe with medicines?
Ask your pharmacist first. A thick fiber can change how fast food and other medicines are absorbed, and the timing matters if you take daily medicine.
A review of 63 studies found limited evidence that fiber lowered the absorption of levothyroxine, a thyroid medicine. A proper time gap helps (Wiesner 2021, Levothyroxine, food and supplements). Never change your schedule without advice.
Add fiber slowly and with fluids. Raising fiber too quickly can cause gas, bloating and cramps (MedlinePlus, Dietary fiber). Tick what applies to you below to see which of the four names matter.
Nothing ticked. Still read the label warnings and tell your doctor about every supplement you take.
- Insulin, diabetes medicine, or low blood sugar spellsL-arabinose · Baobab fiber · Konjac glucomannan
These ingredients were studied for blood sugar after meals or sugar drinks. Ask your doctor or pharmacist first and watch your readings as they advise. (Pasmans 2022, L-arabinose with sucrose (RCT)) (Jazinaki 2026, Glucomannan and cardiometabolic markers)
- Thyroid medicine (levothyroxine) or other medicine taken at a set timeBaobab fiber · Konjac glucomannan
Fiber lowered levothyroxine absorption in limited studies, and a time gap helps. Ask your pharmacist. (Wiesner 2021, Levothyroxine, food and supplements)
- A bowel condition, swallowing trouble, or past stomach or bowel surgeryBaobab fiber · Konjac glucomannan
Fibers can cause gas, bloating, cramps, diarrhea or constipation, and adding fiber too fast makes it worse. Ask your doctor first. (MedlinePlus, Dietary fiber) (Onakpoya 2014, Glucomannan and weight (meta-analysis))
- Several daily medicines
Tell your doctor and pharmacist about every supplement. Some supplements interact with medicines, and the supplied images show no interaction text. (NIH ODS, What You Need to Know) (NCCIH, Using Supplements Wisely)
- Memory or thinking trouble that disrupts daily life
See a doctor. Treatable causes include medicines, depression, sleep apnea, low B12 and thyroid problems. A supplement is not a test or a treatment. (Mayo Clinic, Memory loss: when to seek help) (NIA, Memory problems and aging)
- Surgery in the next two weeks
Supplements can affect surgery or anesthesia, so tell your surgeon about every supplement well before surgery. (NCCIH, Using Supplements Wisely)
A teaching aid, not medical advice, and not a full list of interactions. Your pharmacist can check your exact medicines.
Never stop or change a medicine because of a supplement. Ask a doctor or pharmacist before you add one (NIH ODS, What You Need to Know). Sudden confusion, trouble speaking, face drooping or a sudden severe headache: call 911 (CDC, Stroke signs and symptoms).
On the bottle05
What does Mindcept print about konjac glucomannan?
Only the name, and only on the sales page. The supplied label pictures list no ingredients, amounts, directions or warnings.
A fiber label normally needs a serving and a warning to drink fluids. Neither is in the supplied images, so follow the package you hold and call the order desk at +1 (302) 200-3480 if it is blank.
Compare all four names on the ingredients page, and read fiber supplements and medicines.
FAQ06
Mindcept questions people ask
What is konjac root used for?
Konjac root is a plant root used in some Asian foods and in fiber supplements. Its glucomannan fiber is the part studied for fullness, weight and blood sugar. Studies of those uses give weak or mixed results.
Is glucomannan the same as konjac?
Glucomannan is the fiber found in the konjac root. Konjac is the plant, and glucomannan is the extract sold in supplements. Mindcept names konjac glucomannan with no amount or form.
Does glucomannan have side effects?
Yes. Trials reported belly discomfort, diarrhea and constipation (Onakpoya 2014, Glucomannan and weight (meta-analysis)). Add fiber slowly and with fluids (MedlinePlus, Dietary fiber). Stop and call a doctor if pain is strong or does not pass.
How much glucomannan do studies use?
The studies reviewed used about 2 to 4 g a day (Keithley 2005, Glucomannan: a critical review). Mindcept prints no amount, so a capsule cannot be compared with that range.
Does konjac fiber lower cholesterol?
Not reliably. A 2026 analysis of 11 trials found no significant overall change in blood fat profiles. Ask your doctor about proven ways to manage cholesterol.
Can you take glucomannan with other pills?
Ask your pharmacist. Fiber can slow how some medicines are absorbed, and a time gap may help, as with thyroid medicine. Do not change any prescribed schedule on your own.
Who wrote this07
Written and reviewed by
Pages built from the label, the brand panels and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a USA Authorized Mindcept Retailer. It is not the manufacturer or the distributor of the product. We earn money when you buy through our order links.
Keep reading
More about Mindcept
USA Authorized Mindcept Retailer
Ready to try Mindcept?
Check your medicines first, especially insulin, diabetes medicine and thyroid medicine, then pick a pack. A bottle holds 30 capsules; follow the serving printed on the package you hold.
- Secure checkout
- 60-day money-back guarantee
- Order desk: +1 (302) 200-3480
