Mascoma Sourvisiae Dry Yeast - 500g

Delivery is free for all Lallemand yeasts in 500g format with the code "GOHOPPY".

Sourvisiae® is a bioengineered (GMO) strain of Saccharomyces cerevisiae capable of producing lactic acid during fermentation to provide the brewer with an easy, reproducible, and monoculture product for the production of sour beer.

Sourvisiae® contains a single genetic modification, a lactate dehydrogenase gene, which comes from a food microorganism. The yeast can thus produce high levels of lactic acid, the main component responsible for the sour flavor of beers. Sourvisiae® yeast allows the brewer to ferment and acidify their beer in a single step: this reduces the risks of cross-contamination, costs, total processing time, ultimately resulting in a uniform product. Brewing is done without any modification. Sourvisiae® appears as a conventional yeast and ferments within a normal fermentation timeframe. Sourvisiae® does not produce other compounds associated with brettanomyces, lachancea, or lactic bacteria. Therefore, the acidification is cleaner and more reproducible, and the fermentation is much shorter.