The fiber that actually has EU-approved weight loss claims because it expands massively in your stomach.
Modestly. RCTs show about 0.8kg (1.8 lbs) more weight loss than placebo over 5 weeks. Not dramatic, but consistent and EU-approved.
Glucomannan absorbs 50x its weight in water. Without enough water, it can expand in your throat and cause choking. This is a serious safety concern, not just a suggestion.
Space them at least 1 hour apart. The gel can trap medications and reduce their absorption.
Click through to the studies bar for the evidence base.
See the dosing guide below.
Compare formats before buying.
Some ingredients build up over weeks. Others act fast.
The compound effect of consistent dosing.
Check the cautions section if you have a pre-existing condition.
Some ingredients you feel. Others just work in the background.
Noodles made from konjac root. Nearly zero calories because glucomannan isn't digestible. Popular in Japan for centuries.
Yes. EFSA approved claims for weight management (3g/day before meals), cholesterol reduction, and blood sugar control. It's one of the few supplements with approved EU health claims.
Different mechanisms. Psyllium is a bulk-forming fiber. Glucomannan is a viscous gel-former. Glucomannan may be slightly better for appetite suppression; psyllium may be better for regularity.
Only if you don't drink enough water. With adequate water, it actually helps constipation by adding bulk to stool.
Most research uses 3.0g daily. Below 1.0g, you're probably wasting money. Above 4.0g, no extra benefit. The curve plateaus. Safe upper limit ~ 5.0g.
Glucomannan absorbs water and expands 50-fold, forming a viscous gel that delays gastric emptying, reduces nutrient absorption rate, and increases stool bulk. Also binds bile acids and feeds beneficial gut bacteria.
Konjac Root has emerging evidence.
Konjac plant (Amorphophallus konjac) corm
Konjac corms are peeled, sliced, dried, and milled into flour. The glucomannan is then extracted and purified. The resulting powder can absorb 50x its weight in water.
Konjac Root interacts with other supplements and meds. The analyzer flags interactions, dose mismatches, and timing collisions across your whole list.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.