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Glucomannan

What Glucomannan is & what it does

Glucomannan is a water-soluble polysaccharide (a dietary and cosmetic fiber) most often sourced from the konjac plant. In skincare and sunscreen formulas it works as a viscosity-building and film-forming agent, helping to thicken textures and leave a smooth feel on the skin. It is also valued for its strong water-binding capacity, which supports a hydrated, conditioned surface.

Is Glucomannan safe in skincare?

Glucomannan is a plant-derived fiber commonly used in cosmetics as a thickening and water-binding ingredient and is generally regarded as safe for topical use. It is the same type of fiber found in konjac, which is used in food and konjac sponges. As with any ingredient, those with very reactive skin can patch test a new product first.

What does Glucomannan do in skincare?

In skincare, Glucomannan works as a viscosity-building and film-forming agent, helping to thicken textures and leave a smooth, conditioned feel. Its strong water-binding capacity supports a hydrated surface on the skin. It is often chosen as a plant-based way to give a product body and slip.

Is Glucomannan vegan?

Glucomannan is typically sourced from plants, most often the konjac plant, so it is generally considered plant-based and suitable for vegan formulations. Because it comes from a botanical fiber, no animal-derived material is involved in the ingredient itself. If certification matters to you, check the specific product's vegan labeling.

Sunscreens with Glucomannan

We rate 6 sunscreens that contain it:

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