Caffeine Cutoff
Stop drinking caffeine at the right time to ensure 100% of your sleep cycles are restorative.
15:00
The Half-Life Rule
Caffeine has a "half-life" of about 5-6 hours. This means if you drink a coffee at 4 PM, 50% of that caffeine is still in your brain at 10 PM.
Adenosine Blocker
Caffeine doesn't give you energy; it simply blocks the receptors that detect Adenosine, the molecule that tells your brain it's time to sleep.