is a commercial yeast bank based in San Diego, California. It was founded in 1995 by Chris White after he had completed his PhD work at a yeast laboratory in San Diego. Today, White Labs services clients—mostly commercial brewers, but also homebrewers—in North America and some 80 countries around the world. White Labs maintains approximately 500 yeast strains, of which some 60 are grown to commercial quantities in any given week. Several of these are custom strains, which White Labs maintains under private agreement for individual breweries. Most of White Lab’s sales come from 11 strains. White Labs offers yeast only in liquid form.

The White Labs yeast strains range from standard English ale yeast to wheat beer yeasts, special strains for high-gravity brewing, to various kinds of semiwild Brettanomyces for Belgian-style sour ales. In addition to yeast, White Labs sells several strains of bacteria, such as Lactobacillus and Pediococcus, for the production of sour beer styles, including Berliner weisse and lambic-influenced beers.

The company’s most popular strains are being constantly propagated and are therefore usually in stock for immediate delivery, often within a day.