Vegetarianism and beer

Beer is often made from barley malt, water, hops and yeast and so is often suitable for vegans and vegetarians.

Most beer is filtered without the need for animal products, and so remains vegetarian; however British cask ale producers do not filter the beer at the end of the production process.

[5] When beer is left unfiltered, the yeast that fermented the wort, and turned the sugar in the barley into alcohol, remains in suspension in the liquid.

The yeast that remains suspended in the beer creates a cloudy appearance, and can have a yeasty flavour.

Isinglass is produced from the swim bladders of fish, usually sturgeon, though also those in the polynemidae, sciaenidae and siluridae families;[8] as it is an animal product, cask ale cleared with isinglass is not considered vegetarian.