This article is confusing. I think what they are reporting is, if you have a drink everyday for a year it will age your brain at the rate of 7 days per gram of

This article is confusing. I think what they are reporting is, if you have a drink everyday for a year it will age your brain at the rate of 7 days per gram of daily alcohol. They forgot to mention the "every day for a year" in the stat. "The team found that for every gram of alcohol consumed a day, the brain aged 0.02 years — or, seven-and-a-half days. (The average can of beer or small glass of wine contains 14 grams of alcohol). People who reported drinking every day had brains which were, on average, 0.4 years older than people who didn't drink daily. Smoking had even stronger effect: the team found that those who smoke a pack of cigarettes a day for a year age their brains by 0.03 years (11 days)."