Caffeine plus l-Theanine Clinical studies have confirmed fascinating additional benefits when l-theanine and caffeine are ingested together in a 2:1 ratio: • In several controlled clinical trials, the combination of caffeine plus theanine has been shown to be more effective at improving scores on tests of reaction time, memory, accuracy, and attention than either treatment alone.* • In three clinical trials, the two compounds appear to have a synergistic effect on attention.* • Caffeine and l-theanine taken together as a treatment have been shown to improve subjective mood ratings related to energy in healthy participants as well as to support alertness and focus.* Clearly, the benefit isn’t limited to waking you up. If your day requires alertness, focus, memory, accuracy, and quick reaction times, the synergistic combination in Caffeine + L-Theanine will support your workday effectiveness and performance, no matter how great your weekend was.