It must be hard to differentiate: Hypothesis 1: Polyphenols Hypothesis 2: 2-3 coffees a day is a symptom of a normal life You get that kind of issue coming u

It must be hard to differentiate: Hypothesis 1: Polyphenols Hypothesis 2: 2-3 coffees a day is a symptom of a normal life You get that kind of issue coming up a lot in this sort of research. Like people who don't drink at all are probably more likely to drop dead in the next year than moderate drinkers. Not because drink protects but because people critically ill tend not to drink.