There is a standard drink (differs by country, I believe UK even has labels showing the amount of standard drinks contained) - https://en.wikipedia.org/wiki/Sta

There is a standard drink (differs by country, I believe UK even has labels showing the amount of standard drinks contained) - https://en.wikipedia.org/wiki/Standard_drink https://en.wikipedia.org/wiki/Standard_drink This study is from US, so: “For example, in the United States, a standard drink contains about 14 grams of alcohol“ Not sure if that’s what subjects reported, though. But I guess MDs, PHds and reviewers would have taken it into account.