Clarification Agents

Beer is clarified (made visually clear) using fining agents and filtration. In most jurisdictions, these agents are considered processing aids — they aren't required to appear on the label, even when traces remain in the finished beer.

Common fining agents

• Isinglass — from the swim bladders of fish. Traditional in British cask ale. Not vegan.
• Gelatin — animal-derived. Common in homebrew and some commercial beer.
• PVPP (polyvinylpolypyrrolidone) — synthetic polymer that removes polyphenols to prevent haze.
• Silica gel / silica hydrogel — removes haze-forming proteins.
• Bentonite — clay that binds proteins.
• Carrageenan / Irish moss — seaweed-derived, used in the boil.

Why disclosure is weak

• Processing aids often aren't on mandatory ingredient lists.
• "Vegan-friendly" labelling is voluntary.
• Allergen labelling may or may not apply depending on the agent and jurisdiction.

What this section will track

• Which agents are used by which brewers.
• Where regulation requires disclosure and where it doesn't.
• How to tell, from the outside, what was likely used.

More coming soon.