But the big draw for most yerba mate enthusiasts is the promise of a “clean” caffeine-like buzz, free of jitters and unpleasantness, which yerba mate is said to provide. Drinkers report being in control of their wakefulness; they can stay up for hours, alert and on their game, but sleep is always right around the corner – if they want it. Basically, yerba mate is supposed to give you energy without the negative side effects. A common claim is that yerba mate is actually completely free of caffeine and that its stimulating effects come from a mysterious compound called mateine. Mateine, they say, is a stereoisomer of caffeine, thus giving it the stimulating qualities with none of the downfalls.
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