Not Vegan (Animal-Derived)Category: marine, animal-byproduct, additiveReviewed: Aug 1, 2025

Isinglass

Isinglass is a collagen substance obtained from the dried swim bladders of fish. It is traditionally added to cask ales and wines to accelerate clarification.

Vegan Status Breakdown

Isinglass is a collagen substance obtained from the dried swim bladders of fish. It is traditionally added to cask ales and wines to accelerate clarification.

Biological Origin & Animal Source:

Freshwater and marine fish swim bladders (sturgeon, cod)

Common Synonyms, E-Numbers & Trade Names:

fish isinglasscollagen finingfish swim bladder

Hidden & Derivative Names to Watch Out For:

fish collagenichthyocolla

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Common Uses & Applications

•Fining/clarifying beer and cask ale
•Fining certain white and sparkling wines

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Scientific & Regulatory Authority Sources:

Frequently Asked Questions

How do I know if my beer uses isinglass?
Check Barnivore.com or brewery websites. Most modern canned/bottled beers and craft breweries use centrifugation or bio-fine instead of isinglass.