Check Source RequiredCategory: fermented, processedReviewed: Aug 24, 2026

Beer

While the core ingredients of beer (water, malted barley/wheat, hops, and yeast) are 100% plant- and fungal-derived, some traditional breweries clarify beer using animal-derived fining agents like isinglass (fish bladder collagen) or gelatin. Additionally, milk stouts and pastry sours contain lactose (milk sugar).

Vegan Status Breakdown

While the core ingredients of beer (water, malted barley/wheat, hops, and yeast) are 100% plant- and fungal-derived, some traditional breweries clarify beer using animal-derived fining agents like isinglass (fish bladder collagen) or gelatin. Additionally, milk stouts and pastry sours contain lactose (milk sugar).

Biological Origin & Animal Source:

Fish swim bladders (isinglass), animal gelatin, or dairy lactose in specialty brews

Common Synonyms, E-Numbers & Trade Names:

lageralestoutipapilsnercraft beercask ale

Hidden & Derivative Names to Watch Out For:

isinglass finingslactosemilk sugarwhey solidshoney malt

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Common Uses & Applications

•Direct beverage consumption
•Beer batter for crispy fried tofu and vegetables
•Plant-based stews, chilis, and braises
•Beer bread and pizza dough hydration

Nutrition Facts (per 100g)

Standard reference data via USDA FoodData Central

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43

Calories (kcal)

0.5g

Protein

3.6g

Carbohydrates

0g

Total Fat

0.9g

Dietary Fiber

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Scientific & Regulatory Authority Sources:

Frequently Asked Questions

Why is some beer not vegan?
Certain traditional breweries use isinglass (dried fish bladders) or animal gelatin during the conditioning phase to bind with suspended yeast and polyphenols, clarifying the beer before packaging.
Is Guinness beer vegan?
Yes. In 2017, Guinness transitioned to a modern, state-of-the-art microfiltration system that completely eliminated isinglass finings, making all standard Guinness draught, cans, and bottles 100% vegan worldwide.
How can I check if a craft beer is vegan?
Use community databases like Barnivore.com, check brewery websites for vegan certifications, or look for German Reinheitsgebot purity law compliance (which permits only water, hops, barley, and yeast).