Caffeine shifts brain activity during sleep by increasing EEG complexity and reducing long-range temporal correlations, ...

After this peak the effect of caffeine will start to ... Credit: Getty Images As well as increasing activity in your brain ...

Treating and looking after the 140,000 people a year ... within three hours of an artery taking blood to the brain being blocked. 'Neither caffeine or alcohol offered protection alone, but the ...

Caffeine can boost your brain or break your rhythm — the difference ... Cortisol, a key circadian hormone, peaks approximately 30–45 minutes after waking and contributes naturally to alertness.