Is it vegan? · Konjac (glucomannan, E425)
Last reviewed July 16, 2026Vegan. Konjac (E425) is made from the corm of the konjac plant, whose glucomannan fibre gels foods like shirataki noodles and konjac jelly, so it is vegan.
Konjac is a plant whose root fibre becomes shirataki noodles and wobbly jelly. Root to noodle, it is entirely plant-based.
Konjac is an Asian plant grown for its starchy underground corm, which is rich in a gelling fibre called glucomannan.
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The viscous jelly derived from the dried corm contains a high proportion of glucomannan gum.
That glucomannan is what gives shirataki noodles their bite and konjac jelly its wobble, and it is increasingly used to build vegan seafood alternatives. Since it is all plant, konjac is vegan.
The konjac noodle itself is vegan, made from the glucomannan fibre of the konjac plant. Check any sauce or seasoning that comes with it.
Yes. E425 is konjac, a plant fibre, so it is vegan.
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