The jittery edge after your second (or fifth) coffee
Calm focus. L-theanine paired with caffeine, the combination studied for focus without the jitters, done right.
Three coffees deep. Heart racing, leg bouncing, and still not focused.
Calm focus. zümXR® time-release caffeine drips in over hours instead of slamming you, and L-theanine smooths the edge, the alertness, minus the shake.






