Summary: Lager is beer fermented with Saccharomyces pastorianus strains, which generally work at cooler temperatures than those used for ale.
Reference: Saccharomyces cerevisiae in the Production of Fermented Beverages (opens in a new tab)
Abertay University · Reference checked 21 July 2026
Where to look: PDF page 2, Table 1, and page 3
The summary above is a concise paraphrase of the cited material. It is not a quotation or a complete statement of law.
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