Compare every Glucomannan product across UK retailers on Suppio, ranked by true value - price per active dose, not pack size. Prices refreshed daily.
Konjac-root fibre that expands in the stomach for appetite control
We rank Glucomannan by price per gram of active ingredient - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
Glucomannan is a type of dietary fibre that comes from the root of the konjac plant. It is known for its ability to absorb large amounts of water, which causes it to expand and turn into a gel-like substance inside the stomach.
It is primarily used for appetite control. Because the fibre expands in the stomach, it helps the user feel full for longer, which can make it easier to eat less during the day.
The process begins by harvesting the konjac root, which is then cleaned and dried. The root is ground into a fine powder, and the glucomannan fibre is extracted and refined to create the final supplement powder used in capsules or sachets.
This ingredient is generally mid-range in price. This is because the raw konjac root requires specific growing conditions and a multi-step refining process to isolate the fibre, making it more costly to produce than basic fillers but cheaper than rare synthetic compounds.
| Purpose | Typical studied dose | Evidence |
|---|---|---|
| reductions in body weight and plasma lipid and glucose levels | 3 to 15 grams per day | limited |
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
Prices across our retailer network are refreshed at least daily.
Konjac-root fibre that expands in the stomach for appetite control
We rank Glucomannan by price per gram of active ingredient - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
Prices across our retailer network are refreshed at least daily.