TIL: the placebo effect of coffee

[timelets]

Participants reported getting an energy boost whether they were given the decaffeinated coffee or the caffeinated version.

They could not tell the difference.

http://www.straitstimes.com/world/morning-coffee-leads-to-afternoon-sugar-craving
http://sci-hub.cc/10.1111/1750-3841.13836

If you strongly believe that some potion gives you energy it'll give you the energy.