Master Brewers Podcast

Episode 353: Dialing in PUs with Yeast Ascopores

February 9, 2026·48 min·3-min readinterviewscience
Podzilla Summary (3 min)
TLDR
Traditional pasteurization units (PU) guidelines for non-alcoholic beer are outdated and often lead to over-pasteurization; Greg Rasson’s research at Camden BRI demonstrates that PU requirements can be safely reduced to as low as 20 PU for highly hopped, low-pH non-alcoholic beers, based

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Guest

G

Greg Rasson

interview on Master Brewers Podcast

Mentions

Books, people, and resources mentioned in this episode.

People

Greg Rasson

Companies

Camden BRI

Products & Tools

Ascospores of Saccharomyces cerevisiae BRYC501Capillary tube method

Research & Papers

Master Brewers Technical Quarterly article by Greg Rasson

Topics

non-alcoholic beer pasteurizationyeast ascospore validationhop bitterness and microbial stabilityD and Z value determinationmodernizing outdated brewing standards

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