A startlingly effective pre- and post-workout drink: Nonalcoholic beer
washingtonpost.com
washingtonpost.com
Polyphenols are a broad class that includes lignans, tannins, flavonoids, and stilbenes; I usually hear about the stilbene resveratrol in "alcohol is good for you, actually" contexts. They're also in wine, and in both wine and beer can be dependent on variety and origin.[1]
1: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663142/#B132-m...
> The study was funded by a German brewery, but the researchers declared in the study that the brewer had no input into the study’s design or analysis.