As far as I know those studies have been falsified by at least one large meta-study (f.x. https://www.ncbi.nlm.nih.gov/pubmed/26997174 https://www.ncbi.nlm.nih.

As far as I know those studies have been falsified by at least one large meta-study (f.x. https://www.ncbi.nlm.nih.gov/pubmed/26997174 https://www.ncbi.nlm.nih.gov/pubmed/26997174) which revealed that those studies (showing benefits of moderate alcohol consumption) are based on a sampling bias. Those studies compare a group N of people who never drink with a group O of people who occasionally drink. Group N usually shows slightly more health issues than group O - hence the conclusion. But the problem is simply that there are reasons why people decide to abstain completely from alcohol. And those reasons are often health issues or problems with alcohol in the past. From that angle it is a triviality. Alcohol is mildly toxic to almost all organs - of course maximizing health will be achieved by avoiding it entirely.