The Institute for Scientific Information on Coffee (ISIC), an organization funded by member companies including illycaffè, Jacobs Douwe Egberts, Lavazza, Nestlé, Paulig, and Tchibo, recently published summaries of several scientific studies.
They reported, “[T]he scientific evidence suggests there is no association between moderate coffee consumption at 3-5 cups per day and an increased risk of developing cancer. Research to date also suggests that coffee consumption may be associated with a reduced risk of developing cancer at a number of body sites.”
They cite as one of the bases of this statement in the European Food Safety Authority conclusion from 2015 that: “…caffeine intakes from all sources up to 400 mg per day (about 5.7 mg/kg bw per day for a 70-kg adult) consumed throughout the day do not give rise to safety concerns for healthy adults in the general population.” Other research highlighted includes meta-analyses and population-based research. (Some have not yet appeared in peer-reviewed publications.)
More details, including full citations to the underlying research, are available at: www.coffeeandhealth.org