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Gaba is known for its anti anxiety and relaxing properties. However, taking straight Gaba supplements usually is not very effective as it does not cross the blood brain barrier. L-Theanine on the other hand is a unique amino acid that upregulates GABA and should be effective for the purpose of producing calmness and reducing anxiety such as a racing mind and acute stress. Clinical studies have shown that L Theanine reduces stress, improves the quality of sleep, diminishes the symptoms of PMS, heightens mental acuity, and reduces the negative side effects of caffeine. Typical dose is 200mg 1 or 2 times a day or as needed. It does not act as a sedative at this dose, L-theanine is more your fast acting every day thing to combat minor stressors, mental tasks, improve mood, remain calm (inhibiting cortical neuron excitation) and can even modulate blood pressure increases in a high-stress-response. Glutamate is the body's main excitatory neurotransmitter. Gaba is one of the body's most inhibitory neurotransmitters. Gaba helps to relax and calm, balancing against the glutamate. High copper by the way inhibits the B6 conversion of glutamate to gaba and glutamine, resulting in high glutamate levels. Has my review been of help to you? If so, would you consider hitting the "helpful" button below? I'd greatly appreciate it. Thank you!