I thought wine's medicinal value was common knowledge--I mean really, not in a joking way, but the fact that it was the most prescribed treatment in medieval medicine. Which, given its antiseptic qualities, and the lack of other options for treating infections, actually makes sense.
Of course, there were plenty of warnings about the dangers of over-consumption, and there's more to wine in the medieval understanding than that: https://www.medievalists.net/2012/06/wine-the-physician-and-the-drinker-late-medieval-medical-views-on-wines-uses-pleasures-and-problems/
But for now--that's more than I needed to know for this one scene.
