Brand: Xymogen

L-Theanine 200 120 capsules

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Product Description

Xymogen L-Theanine 200 120 capsules

L-Theanine 200 supports normal nervous system functions by providing L-theanine.

To learn more about this formula on our blog, read here.

What L-Theanine 200 is Best For

L-Theanine 200 may be used for the following:

  • Supports Subjective Feelings of Tranquility in normal People
  • Supports normal Neurotransmitter Levels
  • Supports normal Nervous System Function
  • Supports Normal Cholesterol Metabolism
  • Supports Safety and Efficacy of Certain Chemotherapeutic Drugs

How L-Theanine 200 Works

The tea plant (Camellia senensis) synthesizes L-theanine in its roots and concentrates it in its leaves where it appears as a polyphenol. This water-soluble amino acid, discovered in 1949 was approved as a food additive in Japan in 1964. When consumed orally, theanine is absorbed in the small intestine and once in the plasma can be transported across the blood-brain barrier where it can act as an agonist or antagonist of some receptors.

Study of animal neurochemistry suggests L-theanine increases levels of serotonin and GABA in the brain. Theanine may inhibit excitatory neurotransmission and cause inhibitory neurotransmission via glycine receptors. A double-blind, counterbalanced experiment documenting reduced heart rate and salivary IgA concluded L-theanine reduces psychological and physiological stress responses.

L-Theanine 200 Serving Size

Take 1-2 capsules daily or as directed by your healthcare practitioner.

L-Theanine 200 Ingredients

Xymogen L-Theanine 200 (N-ethyl-L-glutamine) is a naturally-occurring, biologically active, free-form amino acid that gives green tea its characteristic taste. XYMOGEN's L-Theanine is Suntheanine, protected by over 40 U.S. and international patents for its various physiological efficacies and L-isomer specific production processes. Although its notoriety is for its relaxation support; L-theanine also appears to display a neuropharmacology suggestive of a possible neuroprotective and cognitive-enhancing agent.

Serving Size: 2 Capsules

Amount Per Serving % Daily Value
L-Theanine (Suntheanine) 400 mg **

** Daily Value not established.

All XYMOGEN Formulas Meet or Exceed cGMP Quality Standards.

Other Ingredients: Vegetable capsule (HPMC and water), cellulose, magnesium stearate.

DOES NOT CONTAIN: Wheat, gluten, yeast, dairy products, artificial colors, sweeteners or preservatives.

Vegetable Capsules

L-Theanine 200 Side Effects

See label for side effects.

L-Theanine 200 Where to Buy

L-Theanine 200 product is available only from licensed healthcare professionals. Buy L-Theanine 200 Online here at or our clinic.


Keep out of reach of children


Xymogen's Exclusive Professional Formulas including L-Thenine 200 120 capsules are only available through selected licensed health care professionals.

The online sale and discounting of Xymogen formulas are strictly prohibited. Therefore if you plan to buy L-Theanine 200 120 capsules online and you compare L-Theanine 200 120 capsules prices, you should find that all prices for L-Theanine 200 are the same recommended retail selling price.

As licenced health care professionals, Acupuncture Atlanta makes Xymogen formulas such as L-Theanine 200 available only to patients of our clinic. If you are a patient of Acupuncture Atlanta, you may inquire about buying L-Theanine 200 online by calling (404) 233-5080.