The forgotten art of “dry-hopping” beer to enhance flavor is back in vogue. But this practice sometimes has undesirable side effects, such as an unexpectedly high alcohol content and high pressures that could cause beer bottles to break. Now, research published in ACS’ Journal of Agricultural and Food Chemistry explains the biochemical basis of these unintended consequences, which could help brewers create “hoppy” beverages without the quality-control and safety issues.