The best replacement for guarana is caffeine.

The best alternatives to guarana are rated as following:
★★★★★  caffeine
★★★  ginseng
★★★  taurine
★  caffeine pills
★  ackee
★  ephedra
  yerba mate
  kofeina

Your alternative for guarana is not listed? Suggest!
Speaking about guarana, one probably shouldn't forget about white willow bark.

Other search terms related to guarana and their ratings are:
★★★★★ white willow bark
★★ acai
★ cla
willow bark
You have in mind a companion for guarana and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of guarana in all years. Click on graph for more.
guarana
caffeine
ginseng