Glucomannan

Konjac soluble fibre · the rare botanical with an authorised claim — and strict conditions

All articles checked for accuracy against the GB NHC Register and all sources have citations with verified links to their relevant studies.

Glucomannan is a soluble fibre from the konjac plant — one of the few non-vitamin substances that carries a single authorised claim under retained EU law. That permission comes with strict, mandatory conditions and a safety warning.

This article explains what glucomannan is, the exact authorised claim and its legal conditions, the required choking-risk warning, and which WellsparQ products may or may not use the claim. It also summarises the broader research context while making clear which statements are not permitted on product labels.

Ingredient Snapshot

What it is

A water‑soluble, highly viscous dietary fibre extracted from konjac tuber.

Where from

Konjac plant (Amorphophallus konjac) tuber/corm.

Known for

Noted for forming a thick gel when mixed with water; has one authorised EU claim with strict conditions.

In WellsparQ

• Daily amountThe product must provide (and instruct) 3 g glucomannan per day
• Dosing patternTaken as three 1 g doses, each with water, before meals
• Glucomannan Complex1000 mg (1 g) per 2-capsule serving
• Feel WellFull Shake1.05 g per 5 g serving
• KinetiHerb100 mg (konjac fibre)
• GutHerb Plus20 mg (Konjac Powder)
• GentleFlow Blend7 mg

Most plant ingredients in a supplement range are studied but unclaimable — the rules allow no health claim in the brand's own voice. Glucomannan is the unusual exception. It is a soluble dietary fibre from the konjac plant, and it holds one authorised health claim under retained EU food law. But that permission comes wrapped in exact conditions: a specific daily amount, a specific way of taking it, and a mandatory safety warning. Get the conditions wrong and the claim cannot be used. This page explains the fibre, the claim, and — importantly — which WellsparQ products can and cannot carry it.

What glucomannan is

Glucomannan is a water-soluble, highly viscous dietary fibre extracted from the tuber (corm) of the konjac plant, Amorphophallus konjac — a plant long cultivated in East Asia and familiar from konjac flour and shirataki noodles. Chemically it is a long chain of glucose and mannose sugar units (hence gluco-mannan). Because it comes entirely from a plant, konjac glucomannan is suitable for vegans.

Its defining property is viscosity. Glucomannan absorbs water and forms a thick gel, which is the basis of both its studied effects and its most important safety warning. WellsparQ carries it under the labels Glucomannan, Glucomannan Powder and Konjac Powder.

The one authorised claim — verbatim

Glucomannan is one of a very small number of non-vitamin, non-mineral substances with a permitted health claim under retained EU Regulation 432/2012, following EFSA's assessment of the evidence ^¹². The exact authorised wording is:

> "Glucomannan contributes to weight loss in the context of an energy-restricted diet — with 3 g daily in three 1 g doses, each taken with water before meals."

The claim is not a free-standing slogan. Its conditions of use are part of the authorisation, and it may only be used where all of them are met:

The claim cannot be paraphrased into "for weight loss", "fat burner" or "appetite suppressant", and it cannot be attached to a product that does not deliver the 3 g/day-as-3×1 g regimen with water before meals.

The mandatory safety warning — not optional

Because glucomannan forms a gel on contact with water, it carries a genuine choking hazard if taken without enough fluid, and there is a recognised risk to people with swallowing difficulties. Under the conditions attaching to the authorised claim, products must carry a warning to that effect — in substance: there is a risk of choking for people with swallowing difficulties or if taken with insufficient fluid; take with plenty of water to ensure the substance reaches the stomach ^². This warning is a compliance requirement wherever the claim is made, and a sensible safety line to carry on any glucomannan product regardless.

Which WellsparQ products can carry the claim — and which cannot

This is where precision matters, because glucomannan appears across the range at wildly different doses. The authorised claim depends entirely on delivering 3 g/day as three 1 g doses. Assessed against that condition:

Source: WellsparQ Supplements Database. In short: only Glucomannan Complex can realistically carry the authorised claim (with the correct instructions and warning), and Feel WellFull Shake only if its dosing genuinely delivers the 3 g/3×1 g regimen. Every low-dose product — KinetiHerb, GutHerb Plus, GentleFlow Blend, ColonFreshTwo — is far below the condition and must not carry the weight-loss claim in any form.

The wider evidence, briefly

Beyond the authorised weight claim, konjac glucomannan has been studied as a viscous soluble fibre for its effect on blood lipids. A systematic review and meta-analysis of randomised controlled trials in the American Journal of Clinical Nutrition examined konjac glucomannan and LDL ("non-HDL") cholesterol and apolipoprotein B ^³. This is reported here strictly as published evidence, with the usual caveats about dose and trial variety — it is not an authorised claim, and no cholesterol or heart benefit may be stated for a WellsparQ product. EFSA, in the same opinion that supported the weight claim, did not authorise glucomannan claims for post-prandial blood glucose or blood cholesterol on the basis then assessed ^¹.

Where it fits your day

Glucomannan is the range's rare "claimable" botanical — but the claim is a privilege with conditions, not a licence to freewheel. Taken as directed, with plenty of water, before meals, inside a calorie-controlled diet: that is the whole of what the evidence and the regulator allow us to say. Everything else stays off the label. Rooted in nature, backed by research, and careful to the letter.