Caffeine blocks adenosine receptors and prevents the sleepy feeling from fully setting in, even when a person does not consciously feel more alert.

factualpending

Speaker

Dr. Michael Bruce

Evidence Quote

caffeine is still in your system blocking adenosine, preventing that sleepy feeling from fully setting in

Source

My ULTIMATE Senior Guide to Stop Waking Up at NightSleep Doctor
Created: 8/13/2026, 4:50:49 AM

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