Fascinating study, and the journal article is free online[0]. It's an observational study, but of a single occupation and large N, with many other factors acco

Fascinating study, and the journal article is free online[0]. It's an observational study, but of a single occupation and large N, with many other factors accounted for[1]. My take is that coffee, like other psychoactive substances, contains powerful chemicals that are likely to have some effect on total mortality. I will stick to my two cups a day. [0] http://circ.ahajournals.org/content/early/2015/11/10/CIRCULATIONAHA.115.017341.abstract http://circ.ahajournals.org/content/early/2015/11/10/CIRCULA... [1] The regression models included calendar time in 2-y intervals as the time scale, and were stratified by age in years. In the multivariable analysis, we further adjusted for body mass index (BMI), physical activity, overall dietary pattern (aHEI), total energy intake, smoking status, sugar-sweetened beverage consumption and alcohol consumption, all of which were updated from follow-up questionnaires.