Mixed
Higher coffee consumption (up to 8-10 cups/day) is inversely associated with the risk of developing type 2 diabetes, with a 6% risk reduction per cup per day.
Increasing your daily coffee intake, whether caffeinated or decaffeinated, is associated with a lower risk of developing type 2 diabetes. The risk drops by about 6% for each additional cup you drink, with benefits observed up to 8-10 cups per day. You do not need to drink decaf to get the benefit, but if caffeine causes you issues, decaf works just as well. Focus on consistent daily consumption rather than occasional high intake.
The risk of T2D decreased by 6% (RR ¼ 0.94; 95%CI, 0.93–0.95) for each cup-per-day increase in coffee consumption.
Why this rating
Meta-analysis of 30 prospective cohorts with over 1 million participants provides strong observational evidence, though causality is inferred.
Source
Coffee consumption and reduced risk of developing type 2 diabetes: a systematic review with meta-analysis
Mattias Carlström et al. · Nutrition Reviews · 2018
DOI 10.1093/nutrit/nuy014
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