In this episode of Brew Strong, Justin Crossley fills in for Jamil Zainasheff to cover a new topic with John Palmer. They welcome Aaron Justus, Director of R&D and Specialty Brewing, at Ballast Point Brewing, to talk about his recent paper, Tracking IBU Through the Brewing Process: The Quest for Consistency. Published by the Master Brewers Association of the Americas, Aaron's research tackles the difficult question of why there are often large discrepancies between calculated IBU (bitterness), and resulting IBU in finished beer. After more than two years researching and collecting data, Aaron and his team made several surprising discoveries and formulated a method to calculate for the changes in bitterness they were observing. Listen in to learn about this fascinating study and learn how you can gain better control over calculating IBU in your craft beer and homebrewing endeavors.  Learn more about your ad choices. Visit megaphone.fm/adchoices