EndoTrex, like EndoPLus, is designed to address neurotransmitter over-stimulation and is used in patients with high catecholamine turnover or increased GABA excretion.
GABA is the primary inhibitory neurotransmitter in the brain and regulates neurotransmitter activity to prevent over-stimulation.  The theanine in EndoTrex enhances GABA function by inhibiting glutamate activity.

 Product Ingredients,EndoTrex contains the amino acid theanine, which has been widely studied for its ability to provide a calming effect and prevent over-stimulation. These studies match observations by NeuroScience that theanine reduces PEA, norepinephrine, and epinephrine activity/turnover and urinary excretion.EndoTrex is prepared without other amino acids and can be easily be added to other therapies.EndoTrex has been prepared in an advanced liposomal liquid formula for rapid absorption and has a pleasant root beer flavor.
EndoTrex contains Suntheanine® ,L-theanine 50mg/spray

Number of Pumps per Bottle: 84 Serving size: 2 pumps
Dosing: 3-5 times a day (or as directed)
Special Instructions: Spray under the tongue and wait 20 seconds before swallowing