Submitted by LordNPython t3_111ue57 in science
Misabi t1_j8jwia7 wrote
Reply to comment by keylimedragon in High coffee consumption may triple kidney disease risk in some people by LordNPython
>The report says they're treating a cup as 100mg of caffeine from Italian espresso.
Traditionally that would also be made with coffee containing more robusta beans in Italy, which has higher caffeine than the Arabica coffee generally used in the US. A double shot of espresso made from arabica in most coffee shops would likely contain 60mg to 80mg of caffeine.
"Espresso typically has 63 mg of caffeine in 1 ounce (the amount in one shot), according to Department of Agriculture nutrition data. Regular coffee, by contrast, has 12 to 16 mg of caffeine in every ounce, on average. That means that ounce for ounce, espresso has more caffeine.6/01/2023"
keylimedragon t1_j8k2bfl wrote
The study doesn't say, but I'm wondering if since it's an observational study, they estimated total mg of caffeine per day and divided by 100 to get cups. But it's weird that they specify Italian espresso specifically and you're right that an espresso shot has about 60-65mg so it would be about 1.5 shots per cup.
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