East central Iowa | https://archive.ph/20260608154720/https://www.washingtonpost.com/wellness/2026/06/08/love-coffee-have-last-cup-this-time-better-nights-sleep/
"A 2023 meta-analysis of 24 studies on the effect of a standard cup of coffee (about 100 milligrams of caffeine) found that for the best night’s sleep, you need to finish drinking coffee at least nine hours or so before you sleep. So if you’re in bed by 10 p.m., your last cup should be by 1 p.m. My guess is that’s earlier than a lot of us have been operating. (I’m looking especially at you, my four-cups-and-counting-per-day friends). Otherwise, the study found, coffee could reduce total sleep time by 45 minutes and increase how long it takes to fall asleep — or the sleep onset latency — by around nine minutes. (And for context, sleep onset latency of less than 30 minutes is the goal.) |
Coffee drinking
