Caffeine and Sleep: What a New Study Says About Afternoon Coffee
☕ Should You Avoid Coffee After Lunch? New Study Reveals Surprising Brain Effects Do you enjoy a second cup of coffee in the afternoon? You might want to reconsider. A recent study from the University of Montreal has found that drinking coffee after noon may significantly disrupt brain activity during sleep , especially in younger adults. The findings, published in Nature Communications Biology , shed light on how caffeine affects the brain’s recovery processes overnight. 🧠 What the Research Found The study involved 40 healthy adults aged 20–58. Each participant stayed in a sleep lab for two nights—on one night, they took a placebo, and on the other, 200 mg of caffeine , roughly equivalent to two cups of coffee . Brain waves were measured during sleep. ✅ Key finding : When caffeine was consumed after midday, brain activity during sleep became abnormally high , disrupting the natural rest cycles of the brain. This hyperactivity was most pronounced in people aged 20–27 , suggest...