Your Stats
Caffeine Sources
Common Caffeine Content:
Coffee (8 oz / 240 mL)95mg
Espresso (1 shot / 30 mL)63mg
Pre-workout200mg
Energy Drink (8 oz / 240 mL)80mg
Black Tea (8 oz / 240 mL)47mg
Green Tea (8 oz / 240 mL)28mg
Soda (12 oz / 355 mL)34mg
Caffeine Pill (200mg)200mg
💡 Caffeine Optimization Tips
- • Wait 90-120 min after waking for first dose (maximize cortisol)
- • Pre-workout: Take 3-6 mg/kg 30-60 min before training
- • Half-life is ~5 hours (takes 5 half-lives to clear 97%)
- • Tolerance develops in 1-2 weeks; reset with 7-14 day break
- • Genetics affect metabolism (CYP1A2 enzyme)
- • Withdrawal peaks at 1-2 days, subsides in 1 week
- • L-theanine (200mg) can reduce jitters from caffeine