Is Isinglass in beer vegan?
Depends on the brand
Depends — some cask beers are clarified with isinglass from fish swim bladders.
Also listed as: fish bladder finings
Key facts
- Verdict
- Depends on the brand
- Category
- Drink
- Also listed as
- fish bladder finings
- Best swap
- Unfined beers
Why
Isinglass, gelatin and egg albumen are used as fining agents to clear beer and wine. Most modern craft and canned beers are unfined or use silica and PVPP instead.
What to check on the label
- "Suitable for vegans" on the can
- Barnivore.com listings
- Unfined / naturally hazy beers
Swap it for
Unfined beersVegan-certified winesBeers labelled vegan-friendly
Questions people ask
How do I know if a beer is vegan?
Check the label first, then Barnivore, which lists tens of thousands of drinks by brand and product.
Is Guinness vegan now?
Yes. Guinness Draught stopped using isinglass in 2017 and is labelled vegan-friendly.
More drink checks
Reviewed 2026-09-16 by the Veg.ac editorial team · Free to reuse under CC BY 4.0 with a link back.