Header image

Quality testing your beer: Are you hitting the specifications for each beer style?

Tracks
Plenary 1
Thursday, March 6, 2025
9:20 AM - 9:40 AM

Speaker

Agenda Item Image
Dr Glen Fox
Anheuser-Busch Endowed Professor Malting & Brewing Science
University of California

Quality testing your beer: Are you hitting the specifications for each beer style?

Abstract

Brewers dedicate valuable time in designing recipes for a particular beer styles. Balancing the grist to be just right for the targeted gravity, color, and malt flavors. Considering the alpha-acids levels of hops to hit IBU targets. Getting the balance between malt sweetness and bitterness, just right. But how often do they hit those hits those targets. Having tested over 200 beers, from across the USA, covering all styles of beers, the variation in reported %ABV versus actual %ABU measured was concerning. A high percentage of beers were outside the 0.3% ABV as required by the government regulatory body in the USA (TTB). One beer had a 7.3% ABV when the brewery claimed a 8.7% ABV. All beers on the high side of the measured % ABV, and outside the TTB guidelines, were IPA styles. For IBU, most beers were on the low side for the expected range of IBU for particular styles of beers. Several beers had a BU close to the measured IBU which suggests brewers may not be using the correct IBU calculation. Several beers had such low measured IBUs that they were outside on the style guidelines for those beer styles, and these were mostly IPAs, double and Tripple IPAs. These beers would be at risk of losing points in beer competitions. While it may seem minor quality defects aren’t a big deal, there is always a cost, and for a little extra work, they defects can be eliminated.

Biography

Dr Glen Fox is the Anheuser-Busch Endowed Professor of Brewing Science at the University of California. His areas of research are barley, malt and brewing quality. His current research are raw materials and they impact on beer quality. Another research interest is using a number of ‘omics platforms to understand the complex biochemical changes during processing and the compositional profile of beer. Dr. Fox is co-author of “Scientific Principles of Malting & Brewing Science (2nd)” published in 2023 and author of the e-book "Introduction to beer", published in 2024. Professor Fox is in charge of the undergraduate and graduate brewing programs. He is also an instructor for the UC Davis Continuing and Professional Education brewing courses. He has adjunct positions at Stellenbosch University, South Africa; the University of Queensland, Australia and the Nara Institute of Science and Technology, Japan. In 2018 he was elected Fellow of the IBD.
loading