First, they came for our booze. Now coffee is bad for us too?

Like many of us, Emma Barnett starts her day with a cup of coffee. When it comes to coffee, the world appears to be divided into two types of people: fast metabolizers and slow metabolizers. El-Sohemy’s most recent research suggests slow metabolizers — who are also heavy coffee drinkers — might be at higher risk for kidney dysfunction, too. The U of T researchers focused on coffee because, among their research subjects, it was the biggest contributor to dietary caffeine. Many, if not all, of the currently available at-home nutrition-oriented DNA tests would include results for the coffee gene.