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200 mg of Zen contains gamma-aminobutyric acid (GABA) and theanine (glutamic acid gamma-ethylamide), an amino acid derivative found naturally in green tea. Together they help support healthy moods and a feeling of relaxation without sedation.
Research has shown that dietary components can modulate the body’s levels of neurotransmitters, e.g. serotonin, dopamine, norepinephrine, and GABA. Alterations in the levels of these neurotransmitters, perhaps induced by metabolic stress or vitamin deficiencies, e.g. vitamin B6, can significantly influence mood and emotional status, as well as motor function.
GABA is the major inhibitory neurotransmitter in the brain and is active at 20% of central nervous system synapses. GABA, via its neuronal A receptor, inhibits neurons by causing an influx of chloride ions. This chloride influx initiated by GABA is known to be part of the bodily mechanisms involved with mood, muscle relaxation and sedation. A decrease in GABA’s function as an inhibitory mediator or a dysregulated sensitivity of GABA receptors can lead to excessive neuronal activity. Theanine is also recognized to have calming properties.
Theanine offers a unique combination of properties, allowing it to help relieve occasional sleeplessness, and at other times to help restore calm alertness when experiencing fatigue or drowsiness. Human studies have demonstrated that oral theanine supplementation increases alpha wave activity, fostering a state of calm relaxation. Theanine also supports a normal, healthy attitude during premenstrual syndrome, and diminishes the normal symptoms of premenstrual syndrome. Although L-theanine is a component of green tea, 200 mg of Zen does not contain caffeine. We use only Suntheanine®, pure L-theanine from Taiyo International, Inc.