The only time I’ve felt effects of caffeine is horrible jet lag combined with 900mL of cold brew (about 1400mcg of caffeine). I was lifted from the dead and fel

The only time I’ve felt effects of caffeine is horrible jet lag combined with 900mL of cold brew (about 1400mcg of caffeine). I was lifted from the dead and felt the highest relative improvement in mood and wellbeing in my life. I once tried to improve my math exam scores by drinking 4 espressos but didn’t feel a thing. I can easily fall asleep after 2 cups of coffee.