I've been researching some energy pills to take before a workout...All of them are almost identical considering the only real active ingrediant is Caffeine. Some will through some Niacin in, some will through some odd plants oil that does nothing...So my question is, are the caffiene pills like TruckDriver pills, that are 100% caffeine any different than the caffeine from Maugh Haung (spelling?) that is in most diet pills?