Since the thread says "witch ones" I guess I'd have to actually say none; witches brew not being my thing. sorry
Its not a placebo effect. They just pump enough sugar into your system that you do perk up but there is also a crash involved. Energy drinks also do have tons of caffeine but that had little to do with the perk up when you first drink a can. Sent from my SPH-L710 using Tapatalk 2