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A comment on No Alcohol, No Coffee for 27 Months (2016). Parent comment

Re:No Alcohol, No Coffee for 27 Months (2016) by cowgoesmo0 on Tuesday December 10, 2019 @04:33AM (#21751017)
> This does depend on roast; darker roasts have less.

While this is technically true, it's quite misleading because coffee measurements are typically done by weight. Caffeine content between roast levels only differ meaningfully when measuring by volume instead of weight. Coffee beans swell as they are roasted meaning darker roasts are less dense.

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Re:No Alcohol, No Coffee for 27 Months (2016) by kohtatsu on Tuesday December 10, 2019 @07:59AM (#21752005)
FWIW it does impact coffee at Starbucks, at least in Canada.

(Nutrition Information linked from starbucks.ca) https://globalassets.starbucks.com/assets/94fbcc2ab1e2435985...

A 16oz cup of Dark, Medium and Blonde is listed as 260mg, 310mg, and 360mg respectively.

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