No amount of alcohol improves health
Related: A few drinks aren't that bad.
The Lancet published a giant meta-analysis of alcohol consumption. (592 studies!)
Key takeaway:
The conclusions of the study are clear and unambiguous: alcohol is a colossal global health issue and small reductions in health-related harms at low levels of alcohol intake are outweighed by the increased risk of other health-related harms, including cancer.
Article summarizing findings; the full study (a).
So much for a glass of wine at dinner being good for the heart...