Governs your brain's adenosine receptor sensitivity to caffeine. Explains why caffeine causes panic or jitters in some people regardless of liver clearance speed.
Caffeine blocks adenosine A2A receptors in the brain to keep you feeling awake. Carrying the ADORA2A T/T variant makes brain receptors hyper-sensitive to caffeine, triggering nervous jitters, panic feelings, and reduced Stage N3 deep sleep even from small doses.
Standard brain receptor response to caffeine; lower propensity for caffeine jitters.
High adenosine receptor sensitivity; caffeine easily disrupts deep slow-wave sleep and triggers heart jitters.
Yes! Liver speed (CYP1A2) controls how fast caffeine leaves your blood, but brain receptor sensitivity (ADORA2A) controls how strongly your brain responds to caffeine while it's in your system.
Matcha naturally contains high concentrations of L-theanine, an amino acid that crosses the blood-brain barrier and calms caffeine's excitatory effects on brain receptors.
