Alcoholic byproducts like aldehydes are the primary harmful players after alcohol ingestion, not ketones.

“Now, I don't know of anyone who has essentially done what you and I would like, which is the time separation dose dependent curve, where okay, you drink at 10am, then or 11, 12 one two three four five all the way up to you know, 10pm and estimate, what is the blast radius? And is it linear? Or is it nonlinear? Is it such that only when you drink in the last four hours? Do you just hit this exponential and it's bad, bad bad? Or is there some other curve that we could imagine there will be many possibilities. But certainly what we know is that the less alcohol and the less and more specifically the metabolic byproducts, aldehydes and ketones, they're the sort of, the nefarious players.”