*While Supplies Last. Offer subject to change without notice.

The highest quality yeast cultures, products, and lab services for professional brewers

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YEAST FOR BREWING PROFESSIONALS

Brewing Science Institute – Your trusted partner in fermentation excellence.

HIGH-QUALITY YEAST CULTURES

Ready-to-Pitch Liquid Yeast

Our commitment to providing the highest quality liquid yeast cultures ensures you’ll have consistent and successful fermentations no matter what style of beer you are brewing. Every yeast order is grown fresh, and we tailor the cell count to your exact beer specifications. Every strain in our extensive yeast catalog is available year-round with fast lead times. From ales, to lagers, and everything in between, we have you covered.

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AFFORDABILITY THAT SUPPORTS YOUR CRAFT

Get the Best Valued Yeast from BSI

Professional Brewer's Yeast Supplier

We understand now more than ever that professional brewers need to be cost conscious. As a leading yeast supplier in the beer industry, we strive to offer the highest quality liquid yeast cultures at an affordable price that can fit any brewery budget. We make every effort to keep our prices low without ever compromising on quality. We also offer advice on harvesting techniques so you can extend the life of your yeast, further lowering your cost per brew.

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EDUCATION RESOURCES

Brewing Tips and Tricks

The Brewing Science Institute isn’t just a leading and innovative supplier of premium brewing yeast and brewing bacteria. We’re a trusted resource for offering free education and reference guides to help discerning brewers produce the best beer possible.

EXPLORE MATERIALS

LAB SERVICES

Contamination Testing

If you need fast, reliable lab services, you’ve come to the right place. The Brewing Science Institute has decades of experience screening beer and wort samples for beer-spoiling organisms. We use differential media plating and cutting-edge PCR methods to identify contaminants, giving you fast results and peace of mind.

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YEAST BANKING SERVICES

Bank Your Proprietary Yeast with BSI

Do you have a special yeast strain that you can’t get anywhere else? We offer yeast banking services to keep your proprietary yeast secret and safe. Once your brewer’s yeast is stored in our bank, we can grow you a pitchable amount using our proven propagation methods.

BANK WITH BSI

Customer Testimonials

"Prior to opening Bierstadt, we had been BSI customers for over 20 years. Bierstadt has never used any other yeast supplier, and wouldn't. We have traveled to Europe with the owners and watched the brewers at several German lager breweries harvest yeast for them to bring back. In our opinion, BSI is largely responsible for the resurgence of lager in America and instrumental in improving the quality of beer in our industry. You can do no better."

Ashleigh Carter / Bill Eye

Founders, Bierstadt Lagerhaus

"I've been a customer for 22 years and I must say BSI has been a great help to me and a bottomless source of knowledge. They are great folks and stand behind their products. We've been blessed with 11 Gold, 6 Silver, and 6 Bronze Medals and Awards and BSI yeast was in every one of those beers."

John Dean

Brewmaster, Blind Tiger Brewery

"BSI has been an incredible partner in our success and growth. David and Bryan know yeast for sure, but they were first brewers, and they advise us based on their actual hands-on experiences, rather than with just theory. Furthermore, unlike the 90% of US craft breweries producing mostly ale, we are highly focused on German lagers. To our benefit, BSI is passionate about promoting traditional lager brewing, which they have nurtured with strong connections to the brewing culture in Germany."

Stephen R. Holle

founder, Kansas City Bier Co.

"At OCC Brewing we strive for the highest quality standards when it comes to our beer, food, and service. Having worked at BSI for several years prior to opening our brewery, I can attest that they also strive for the highest quality standards in the industry. "It's All About the Fermentation" when it comes to our beer and I wouldn't trust our beer to anyone else's yeast! Cheers to David, Bryan, Cori and the entire BSI family!"

Dan Ramos

founder, OCC Brewing

“What I love about BSI is the consistency of their yeast. Know that I will get consistent and great fermentations every time.”

Steve Parker

founder, Fidens Brewing

“The team at The Brewing Science Institute is very helpful every step of the way. They have helped me determine which yeast strain to use for experimental beers, discussed streamlining fermentation programs and even let me use proprietary strains of yeast never before used on a production scale to gain data and flavor profiles. Quality is always top notch, delivery times are consistent and the level of knowledge the entire team holds is world class. ”

Charles McManus

Head Brewer, Phantom Canyon Brewing Co.

"High quality yeast, great customer service, convenient ordering!"

Cameron Frigon

Founder, Gravity Bound Brewing Co.

"Excellent service! Very easy to work with!!"

Andrew Porter

Tree House Brewing Co.

It’s All About Fermentation with The Brewing Science Institute

At the Brewing Science Institute, “It’s All About the Fermentation” is not just a slogan. It’s our ethos. We believe that every great beer starts with great yeast. With decades of industry experience cultivating commercial brewer’s yeast, we provide professional brewers with the highest-quality yeast cultures, cutting-edge fermentation solutions, superior contamination testing and banking services, and expert technical support.

From yeast strain selection to troubleshooting, our dedicated team is here to help commercial breweries of all sizes across the nation find the right yeast strain, achieve a successful fermentation, and create award-winning beers. We’re also a trusted resource for top-notch brewing education, offering tutorials, tips, tricks, and reference guides to help brewers of all levels improve their beer and yeast knowledge.

Let’s advance the science of brewing together. Contact us today for more information regarding any of our brewer’s yeast products or services to create the best beer possible.

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