A Great Time to Try Sourvisiae… Save 15%

Sourvisiae® Ale Yeast

  • William’s Brewing carries an extensive line of dry yeasts including Safale (including US05, S04 and BR8), Mangrove Jack’s and Apex, Sourvisiae, Lallemand Strains (including Wildbrew) at generally great prices.
  • Shipping is free or reasonably priced flat rate to addresses in the contiguous US depending on your order size for most items.

William’s is discounting their entire lineup of dry yeast by 15% for a limited time. No coupon code is required. Discount is reflected in your cart.

Full Selection Dry Yeast

The selection includes Mascoma Sourvisiae

More Info…

Are you interested in making sour beers but think they are too complex? Sourvisiae® is a bioengineered ale yeast strain (Saccharomyces cerevisiae) capable of producing lactic acid during fermentation, eliminating the need to add souring cultures later on in the ferment.

Sourvisiae® contains a single genetic modification, a lactate dehydrogenase gene from a food microorganism, which enables the yeast to produce high levels of lactic acid, the main compound that gives sour beers their flavor.This allows the brewer to ferment and sour the beer in one simple step, instead of using yeast and then adding souring cultures later on in the ferment.

The brewing process is conducted without any modifications; Sourvisiae® is pitched just like conventional yeast and ferments in a normal fermentation time. Sourvisiae® does not produce other flavor compounds associated with Brettanomyces, Lachancea, or Lactic Acid Bacteria, providing a cleaner and reproducible souring process, with shorter fermentation times. Make sour beers with one simple yeast addition.

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