Sourvisiae® is a bioengineered Saccharomyces cerevisiae strain that produces high levels of lactic acid during a standard primary fermentation. This 500g bulk brick is the perfect solution for commercial breweries producing Gose, Berliner Weisse, and other tart ales without the need for kettle souring or bacterial inoculation. Sourvisiae provides a clean, refreshingly tart profile with the reliability and speed of a traditional ale yeast, significantly reducing production time and the risk of cross-contamination.