As a non-drinker apart from rare occasions (1-2x per year), here’s my anecdotal experience.
Over the course of an evening:
- 5-6oz of a 7% IPA and I’m feeling good. This is around my personal cutoff if I do happen to have a drink.
- 1 16oz IPA and I’d be feeling borderline drunk.
- 2 16oz IPAs would leave me right and properly drunk with a good chance of a hangover.
- 3 or more and I am feeling way too drunk, my stomach contents are no longer guaranteed to stay in place, and I’m guaranteed to wake up with a robust hangover.
I drank quite a bit up until about 6 years ago, and back then I could consume multiple times these amounts and feel fine.
I am a healthy, fit person in my mid-late 20s, and to my knowledge don’t have any genetic predisposition to alcohol intolerance.