"'There are many reasons to be skeptical'
From analyzing 87 studies that looked at the effects of alcohol consumption on death from all causes, the team identified a number of flaws in the way the studies were designed.
One major issue they found was how the studies defined "abstainers" - people who do not drink alcohol.
The researchers explain that many of the studies compared moderate drinkers - which they define as individuals who consume up to two alcoholic beverages daily - with "current" abstainers, but these abstainers may include individuals of poor health who have stopped drinking.
"A fundamental question is, who are these moderate drinkers being compared against?," says Stockwell."