Is Chitosan vegan?
Depends
Chitosan from shellfish shells is not vegan. Mushroom-derived chitosan is.
What it is
A fiber derived from chitin — the structural material in crustacean shells or fungal cell walls.
Why depends
Default chitosan comes from shrimp and crab shell waste. A small but growing supply is made from mushrooms (e.g., Aspergillus niger).
Where you'll find it
- Weight-loss supplements
- Wine fining agents
- Wound dressings
- Some haircare
Vegan alternatives
- Mushroom-derived chitosan (look for 'vegan chitosan' or 'fungal chitosan')
- Plant fibers (glucomannan, psyllium)
FAQ
- Is chitosan in wine vegan?
- Usually not — it's typically shellfish-derived. Check Barnivore or look for vegan certification.