GABA Trex is an easy-to-administer chewable tablet providing rapid delivery of contents for calming relief. GABA Trex contains the amino acid L-theanine, which has been widely studied for its ability to produce a calming effect and prevent over-stimulation. It has been postulated that L-theanine effects are due to its ability to antagonize glutamate receptors, thereby dampening excessive stimulatory neurotransmission. L-theanine indirectly supports GABA activity by dampening glutamate receptors, which frees GABA to perform other functions. It is recommended to address elevated glutamate levels and for patients with overstimulation.