Samuel Smith's Imperial Stout - a vegetarian beer

Beer contains malt from barley, water, hops and yeast, as such the majority of beer is made without animal products, and is acceptable to vegetarians;^[1][2] however, some breweries - such as British cask ale producers - may use animal products in the filtering process.^[3] Most breweries do not reveal if they do or do not use animal products in the processing of their beers; exceptions are Samuel Smith, Anheuser-Busch, and the Marble Brewery in Manchester, all of whom have declared they make vegetarian beer.

[edit] Non-vegetarian additives

[edit] Finings

Most beer is filtered without the need for animal products, and so remains vegetarian; however British cask ale producers don't filter the beer at the end of the production process.^[4] 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.^[5] Finings are used to clear the beer of yeast – there are a variety of agents used as finings, including silicon dioxide, gelatin, polyclar, and isinglass.^[6]

Isinglass is the most common fining used to clear cask ale. Isinglass is produced from the swim bladders of fish, usually sturgeon, though also those in the polynemidae, sciaenidae and siluridae families;^[7] as it is an animal product, cask ale cleared with isinglass is not considered vegetarian.

There are vegetarian alternatives to isinglass. Bentonite and Irish moss are the two most common.^[8]

[edit] Glycerol monostearate

A brewer may also use some form of animal product in the later stages of beer processing, such as glycerol monostearate, which is used to create a foam or head on the finished beer.^[9]

[edit] Packaged beers

Other than bottle conditioned, beers which are packaged in cans, bottles or kegs are filtered in some form, either pasteurised or cold-filtered. In general filtering doesn't require the use of finings,^[10] though animal finings may be used on some batches that are too hazy to be cleared easily by the regular filtering methods.

[edit] Vegetarian breweries

Even though the majority of beers are vegetarian, most brewers do not reveal which beers do not contain animal products. Those brewers who have published this information include Samuel Smith, ^[11] Anheuser-Busch,^[12] MillerCoors,^[13] and the Marble Brewery in Manchester, UK.^[14]

[edit] References

[edit] External links

• List of vegetarian beers
• A List of Vegan & Vegtarian Beers