Vegetarianism and beer a yeasty flavour. 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. 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; as it is an animal product, cask ale cleared with isinglass is not considered vegetarian. A brewer may also use some form of animal product in the later stages of beer processing, such as glycerol monostearate, which is used
Yeast in winemaking otherwise noted, this article will commonly refer to the asexual form of wine yeast. The most common yeast generally associated with winemaking is "Saccharomyces cerevisiae" which is also used in bread making and brewing. Other genera of yeast that can be involved in winemaking (either beneficially or as the cause of potential wine faults) include: The yeast genus "Saccharomyces" (sugar mold) is favored for winemaking (for both grapes as well as other fruit wines in addition also to being used in brewing and breadmaking) because of the generally reliable and positive attributes it can bring to the wine. These yeasts