Three-shot monster coffee from a chain - Tradução em português

The study is enormous (just under 50,000 people were included), and looks at a wide range of ages, which is a real strength. However, they only assess coffee drinking once, at the start of the study. The participants were asked to report number of cups drank per week. But questioning wasn't any more nuanced than that. It can't really be: in a study this big, collecting the data would take far too long.
There's a huge variation in caffeine from cup to cup. Compare a three-shot monster coffee from a chain to a half-a-teaspoon weak cup of instant you make yourself; all this kind of detail isn't picked up in this study. The authors of the paper point out that coffee drinking is relatively stable across people's adult life, but it may still be that people who drank many cups at the beginning of the study may have cut down by the end. For example, coffee use might be stable during your working life, but after retirement you might cut down. And this is important, since their headline finding is that lots of coffee is only bad for younger people.

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