Last reviewed May 2026 · 1 min read
Is Isinglass vegan?
Also known as: Fish gelatin, Ichthyocolla
Not Vegan
Derived from animals — avoid.
See all non-vegan ingredients →
No — It is obtained directly from the dried swim bladders of fish, most commonly sturgeon or cod.
01 · The basics
What is Isinglass?
A gelatinous substance used primarily as a fining agent to clarify beverages, making them clear rather than cloudy.
02 · The source
Where it comes from
It is obtained directly from the dried swim bladders of fish, most commonly sturgeon or cod.
03 · Alternatives
Best vegan alternatives
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Frequently asked
FAQ
Is isinglass still used in modern brewing?
Yes, though its use is declining. Many major breweries like Guinness have recently transitioned away from isinglass to vegan-friendly filtration methods.
Do I actually drink the isinglass?
Mostly no. It binds to yeast and particles and settles at the bottom of the vat, but trace amounts can remain in the final beverage.
Commonly found in
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Calcium Gluconate
A firming agent and acidity regulator.
Chitin
A fibrous substance consisting of polysaccharides, used in agriculture, winemaking, and dietary supplements (for weight loss).
Chitosan
A linear polysaccharide derived from chitin, heavily marketed in supplements as a 'fat binder' for weight loss.
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