Zen Theanine™


Promotes relaxation without drowsiness*

  • Naturally-sourced L-theanine in an optimal dose
  • Fast-acting and effective with one high-dose capsule
  • Promotes a calm, relaxed alertness without causing drowsiness
Gluten Free

Zen Theanine™ is an ideal formula for those who are looking to sleep better, improve their concentration, and feel more relaxed in general. Targeting neurotransmitters, Zen Theanine™ harnesses the power of L-theanine to help you achieve what is called “alert calmness.”

The amino acid L-theanine is not only a well-known dietary supplement, but also a food additive used in Japan to give foods and beverages a savory flavor. L-theanine supports alpha-wave brain activity, which is associated with the relaxed and peaceful alertness that is experienced during meditation and it rapidly enters the system when ingested (within roughly 40 minutes).

L-theanine promotes mental focus along with a feeling of relaxation plus alertness because it has a chemical structure very similar to glutamate, an amino acid that occurs naturally in the body and helps transmit impulses in the brain. L-theanine appears to modulate the motor stimulation associated with caffeine as well as inhibit some of the actions of the stress hormone norepinephrine in the central nervous system.

AOR Advantage

Zen Theanine™ provides naturally sourced L-theanine in an optimal dose backed by clinical research. It offers an ideal option for those suffering from stress or feelings of anxiousness, especially when those feelings compromise the ability to work, study or sleep.


Zen Theanine™ is L-theanine, a unique amino acid found primarily in green tea associated with promoting calm and relaxed alertness.*


AOR™ guarantees that all ingredients have been declared on the label. Made without wheat, gluten, nuts, peanuts, sulfites, soy, dairy, eggs, fish, shellfish or any animal byproduct.


Take one capsule daily without food, or as directed by a qualified health care practitioner.


Consult a health care practitioner before use if you are pregnant, lactating, have a medical condition, or if you’re taking any medication. Consult a health care practitioner if you have a liver disorder, or if you have an iron deficiency. Keep out of reach of children.

Main Application
  • Relaxation
  • Mood support
  • Cognitive support

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Serving Size: One Capsule / Serving Per Container: 120
Per Capsule
Amount Per Serving
% Daily Value
225 mg

† Daily Value not established.


Other Ingredients: microcrystalline cellulose.

Capsule: hypromellose and purified water.


He P, Wada S, Watanabe N, Sugiyama K. “Liver injury-preventive effect of tea theanine in rats.” Journal of Food Science 2000; 65(1): 30-33.

Juneja LR, Chu DC, Okubo T, Nagato Y, Yokogoshi H. “L-Theanine–a unique amino acid of green tea and its relaxation effect in humans.” Trends in Food Science & Technology 1999; 10: 199-204.

Kakuda T, Yanase H, Utsunomiya K, Nozawa A, Unno T, Kataoka K. “Protective effect of gamma-glutamylethylamide (theanine) on ischemic delayed neuronal death in gerbils.” Neurosci Lett. 2000 Aug 11; 289(3): 189-92.

Kimura R, Kurita M, Murata T. “[Influence of alkylamides of glutamic acid and related compounds on the central nervous system. III. Effect of theanine on spontaneous activity of mice (author’s transl)].” Yakugaku Zasshi. 1975 Jul; 95(7): 892-5. Japanese.

Kimura R, Murata T. “Influence of alkylamides of glutamic acid and related compounds on the central nervous system. I. Central depressant effect of theanine.” Chem Pharm Bull (Tokyo). 1971 Jun; 19(6): 1257-61.

Sugiyama T, Sadzuka Y, Tanaka K, Sonobe T. “Inhibition of glutamate transporter by theanine enhances the therapeutic efficacy of doxorubicin.” Toxicol Lett. 2001 Apr 30; 121(2): 89-96.

Yokogoshi H, Kobayashi M, Mochizuki M, Terashima T. “Effect of theanine, r-glutamylethylamide, on brain monoamines and striatal dopamine release in conscious rats.” Neurochem Res. 1998 May; 23(5): 667-73.

Yokogoshi H, Kobayashi M. “Hypotensive effect of gamma-glutamylmethylamide in spontaneously hypertensive rats.” Life Sci. 1998; 62(12): 1065-8.

Yokozawa T, Dong E. “Influence of green tea and its three major components upon low-density lipoprotein oxidation.” Exp Toxicol Pathol. 1997 Dec; 49(5): 329-35.

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