What it is
Glucomannan is a water-soluble polysaccharide composed of glucose and mannose units, obtained chiefly from the konjac tuber. It swells and forms a gel in water, which makes it useful as a natural thickener and film former in cosmetic formulas. It also contributes humectant-like conditioning that can support a soft, hydrated skin feel.
Safety & warnings
A polysaccharide widely regarded as well tolerated and non-irritating at cosmetic use levels, with a low likelihood of sensitization.
Origin & sourcing
Natural, most commonly extracted from the tuber of the konjac plant (Amorphophallus konjac); it also occurs in some other plant sources.
Questions everyone asks
Where does glucomannan come from?
It is most commonly derived from the konjac tuber, where it is the main soluble fiber polysaccharide.
What is its role in a formula?
It acts as a natural thickener and film former and provides conditioning, hydrating skin feel.