Lager is one of the two main categories of beer, the other being ale. Lager is brewed with a bottom-fermenting yeast at lower temperatures; Ale is brewed at higher temperatures, with a top-fermenting yeast. The yeast most often used for Lagers is Saccharomyces carlsbergensis (aka Saccharomyces pastorianus.) Owing to the lower temperatures, Lagers in general…
