No Caffeine After 2 PM
Experiments Easy 14 days oura
Start the Health OS protocol "No Caffeine After 2 PM" (experiments-caffeine-cutoff-2pm) and show me today's step.
Goal
Test whether an earlier caffeine cutoff improves falling asleep and nighttime HRV
Hypothesis
Last caffeine before 2 PM → shorter sleep latency → higher HRV
Caffeine's half-life is 5–6 hours; evening caffeine raises sleep latency and nighttime sympathetic tone
Phases
1
Baseline
7 days- Drink caffeine as usual, log the time of your last cup
2
2 PM Cutoff
7 days- No caffeine after 2 PM
- Log the time of your last cup
Tracked Metrics
Primary
Secondary
Evaluation
Method: compare_phase_means
Design: baseline (7 days) → intervention (7 days)
Safety
Disclaimers
- Not an invitation to increase total caffeine intake