Typical dose
As a dietary supplement: 1-3 grams of glucomanna...
Oral
Oral safety: low
About this supplement
Konjac glucomannan gel is a viscous, water-soluble dietary fiber derived from the root of the Amorphophallus konjac plant (konjac or elephant yam). It is composed primarily of glucomannan, a high-molecular-weight polysaccharide made of D-mannose and D-glucose units linked by β-1,4 bonds. In gel form, it is produced by hydrating konjac glucomannan powder, resulting in a thick, elastic, and highly absorbent substance with exceptional water-holding capacity. It is widely used as a dietary supplement for weight management, cholesterol reduction, and digestive health due to its potent bulking and prebiotic properties. In topical beauty applications, it forms a clear, non-greasy film that provides hydration and can act as a texture enhancer or delivery vehicle.
How much to take
- Typical amount
- As a dietary supplement: 1-3 grams of glucomannan (equivalent to gel volume as directed), taken with 1-2 glasses of water, 30-60 minutes before meals, up to 3 times daily. Topically: Used as a component (0.1-2%) in skincare formulations.
- Suggested range
- 1-3 g daily (in divided doses, with ample water)
Potential benefits
Benefits linked to this supplement form:
Things to watch for
Possible side effects linked to this form:
Health goals
Needs and goals this form may help with:
Other forms of Glucomannan
Compare absorption and active amounts with sibling forms:
Technical details â–¼
Chemical ID (CAS)
37220-17-0 (for glucomannan)
Physical properties
Clear to off-white, viscous, elastic gel. Odorless and tasteless when pure. High water solubility and swelling capacity (can absorb up to 100 times its weight in water). Forms a thick, non-Newtonian fluid. pH stable across a wide range.
How it’s made
Konjac tubers are washed, sliced, dried, and milled into a fine flour. The flour is purified to extract glucomannan. The purified glucomannan powder is then hydrated with water under controlled stirring to form a homogeneous gel. For supplement use, it may be further processed into capsules or mixed with other ingredients. For topical use, it is often incorporated into cosmetic formulations as a thickening or gelling agent.