[kuipferings]

3-4 cups of coffee is the exact amount you need to get through a workday, and only lower class types drink instant coffee.

All of these studies are hot garbage, hopelessly confounded, the biggest scam in science is "controlling for".

Do an RCT and watch the coffee magic evaporate.

[brokensegue]

RCTs are expensive and sometimes possible. We do these studies first. The paper says

>Our study suggests the importance of further research investigating the role of coffee consumption in biological ageing.