Last reviewed May 2026 · 1 min read
Is Konjac (E425) vegan?
Also known as: E425, Konnyaku, Konjac gum, Glucomannan, Devil's tongue jelly
E-number: E425
Vegan
Suitable for a vegan diet.
Yes — Konjac is a plant-based product made by drying and milling the corm (tuber-like root) of the Amorphophallus konjac plant.
01 · The basics
What is Konjac (E425)?
A food ingredient derived from the root of the konjac plant, used to make flour and a jelly called konnyaku. It is a source of the soluble fiber glucomannan and is valued as a gelling agent and thickener.
02 · The source
Where it comes from
Konjac is a plant-based product made by drying and milling the corm (tuber-like root) of the Amorphophallus konjac plant. It is entirely derived from plants and is therefore vegan.
Frequently asked
FAQ
What are shirataki noodles made of?
Shirataki noodles are made primarily from konjac flour (glucomannan) mixed with water and sometimes a small amount of calcium hydroxide to help the mixture set. They are known for being very low in calories and carbohydrates.
Is konjac (E425) a good gelatin substitute?
Yes, konjac is an excellent vegan substitute for gelatin, particularly in products like gummies and jellies. It creates a similarly firm, chewy texture and is derived entirely from plants.
Are konjac jellies a choking hazard?
Yes, certain types of konjac jelly desserts have been associated with choking incidents, particularly in children. This is due to their firm, gelatinous texture that doesn't dissolve easily in the mouth, leading some countries to require warning labels or ban certain product shapes.
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