User blog comment:Dennyandk9/Does caffeine interfere with psi powers?/@comment-73.76.193.171-20160303154748

The only official study about the topic indicated that caffeine in moderate doses help with psi. But it can be done or overdone.

"Rhine found that some individuals could reliably demonstrate telepathy and clairvoyance in laboratory settings. The subjects did better when alert, and therefore, not surprisingly, caffeine seemed to improve ESP. Accuracy did not seem to drop off at distance (even hundreds of miles), which probably means that it is not some kind of inverse-square-law radiation. Alas, 'Mental Radio!' Mental Internet is probably closer to reality... "

http://sacred-texts.com/psi/esp/index.htm