It’s not just a one study says one thing and the next study says another.
The negative-side official, peer reviewed research is massive.
There is the occasional “study” that “proves” a couple of drinks a day is okay or even beneficial. Those get a ton of news for obvious reasons.
But they always seem to have problems.
There was a study saying moderate alcohol was good. People knew the study was flawed right away. The study included recovering alcoholics in the “non-drinker” group! Once you put those people in the “drinker” group the numbers came out exactly as you expect.
Another one was a meta-study: a study of studies. Easy to manipulate by choosing certain ones and weighting them appropriately. It turned out to be funded by a liquor backed organization. And the authors did not mention this funding in the paper! This is a big no-no. It violated the journal’s and the author’s medical school policies. Source of funding must be disclosed to avoid exactly this sort of nonsense.
Note that these “positive” studies get a ton of news. The debunking doesn’t. Hmmm.
The new study doesn’t tell us anything we already didn’t know for a long time.