Lallemand

Lallemand Sourvisiae - 500g

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Sourvisiae® is a bioengineered ale yeast strain (Saccharomyces cerevisiae) capable of producing lactic acid during fermentation to provide brewers with an easy, reproducible, and mono-culture product for sour-style beer production.

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. Sourvisiae® allows the brewer to ferment and sour the beer in one simple step, reducing cross-contamination risks, lowering costs, cutting total process time, and allowing brewers to obtain a consistent product. 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 more reproducible souring process, with much shorter fermentation times.

Best For

Best For Sour Beers

Quickly see where this product fits best in a professional brewing program.

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Sour Ales

Ferments and sours in one step, with a normal fermentation time.

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Berliner Weisse

Clean, reproducible acidity without Brett or bacteria character.

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Gose

Lactic sourness from the yeast itself, in the same step as fermentation.

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One-Step Souring

Cuts cross-contamination risk, total process time, and cost compared with bacterial souring.

Technical Specs

Quick Brewing Specifications

Yeast Type Sour / Lactic Acid Producing
Species Saccharomyces cerevisiae (bioengineered)
Attenuation 76–82% | Medium–High
Fermentation Temp 59–72°F | 15–22°C
Flocculation High
Alcohol Tolerance 12% ABV

Technical Resources

Documents & Product Support

Download technical sheets, safety documents, and product reference materials for this product.

TDS
TDS

Sourvisiae Technical Data Sheet

Official technical data sheet with product specifications, fermentation performance, and brewing application information.

View TDS
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Brand Partner

About Lallemand Brewing

Premium fermentation products for professional brewers, including dry yeast, bacteria, nutrients, enzymes, and process aids.

Lallemand Brewing is a trusted fermentation partner for breweries of all sizes, offering high-quality dry yeast and fermentation products built for consistency, reliability, and brewing performance. Their portfolio includes ale yeast, lager yeast, kveik strains, souring bacteria, conditioning yeast, nutrients, enzymes, and other technical brewing solutions.
For brewers, Lallemand provides practical fermentation tools that are easy to store, easy to manage, and dependable in production. Whether the goal is a clean lager profile, a hop-forward IPA, a traditional ale, a sour beer, or consistent bottle conditioning, Lallemand gives breweries proven options for building better beer from fermentation forward.
Montreal, Canada / Global Brewing Supplier

Why Brewers Choose Lallemand Brewing

  • •Premium dry brewing yeast built for dependable fermentation performance.
  • •Broad strain selection for ales, lagers, IPAs, Belgian styles, kveik, sour beers, and bottle conditioning.
  • •Practical fermentation products including yeast, bacteria, nutrients, enzymes, and brewing process aids.
  • •Strong technical brewing knowledge backed by Lallemand’s deep experience in fermentation science.
  • •Reliable option for breweries that need consistency, shelf stability, and easy yeast handling in production.

Why Pro Brew Supply Carries Lallemand Brewing

We carry Lallemand because their products make fermentation more dependable for brewers. Dry yeast gives breweries strong shelf stability, simple handling, and reliable performance without overcomplicating the cellar. Their wide strain selection also makes it easier to match the right yeast to the right beer style.

Lallemand Brewing