alt Hacker News> The most pronounced associated differences were observed with intake of approximately 2 to 3 cups per day of caffeinated coffee or 1 to 2 cups per day of tea.
Weird, tea is supposed to have half the caffeine of coffee.
Replies
whaleidk • today at 4:05 PM
Anecdotally, I never feel more awake when having coffee. I can drink coffee at night and sleep great. On the other hand, if I try to sleep too soon after tea I feel very mentally awake and can’t sleep for restlessness. Maybe Qi is real!
Both coffee and tea have thousands of other constituent parts which could play a role.
The decaffeination process also removes more parts than just the caffeine.