Here's a top google result. https://www.webmd.com/heart-disease/news/20220125/no-amount-...
And a second https://www.sciencedaily.com/releases/2018/08/180824103018.h...
[1] It's not really a vitamin, because we do produce it internally (as opposed to having to ingest it in diet).
My understanding is that more modern research has unambiguously debunked the "light drinking" assertions.
But this is not something I'd expect you to be convinced of, because I don't have hard evidence on hand. We will have to leave it there, and I will go refresh my understanding some other time, if you will too :)
All the sources here:
Breathing is, too, but the important question is what proportion of light drinkers become alcoholics. According the the first legitimate looking hit, 56% of people have had a drink in the last month, 5.6% of people have an "alcohol use disorder."
So, ignoring details, 90% of light drinkers are fine.
Heavy breathers not so much.
When some studies show a lower cancer rate correlated with moderate consumption of certain alcoholic beverages, e.g. wine or beer, it is much more likely that those studies show a beneficial effect of some other substances contained in those beverages.
In that case, it is likely that drinking the non-fermented precursors of those beverages might have the same effects, even in the absence of alcohol, e.g. drinking fresh grape juice instead of wine, or even better, eating red or black grapes instead of drinking juice.
Alcohol in small enough quantities may have negligible bad effects, because humans and their relatives are adapted to tolerate the ingestion of fermented fruits, but there is no reason to expect any good effects.
Associated or correlated? Which cancers?