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BioSynergy L-theanine


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L-theanine is a relaxing, health promoting amino acid found in tea.

BioSynergy's L-theanine (Suntheanine™) creates an alert yet totally relaxed state of mind without drowsiness. This brand of L-theanine is clinically proven to reduce stress, improve the quality of sleep, diminish normal syptoms of PMS, heighten mental acuity and reduce negative side effects of caffeine.

L-theanine is a unique free form amino acid found only in the tea plant and in the mushrooms Xerocomus badius and certain species of genus Camellia, C. japonica and C. sasanqua.

Biologically Active - In addition to relaxation, research suggests that L-theanine may have application in diminishing symptoms of PMS, improving learning performance, heightening mental acuity - neurotransmitter,

promoting concentration, acting antagonistically against the paralysis induced by caffeine, supporting the immune system, lowering blood pressure, increasing formation of the inhibitory neurotransmitter GABA, and increasing brain dopamine levels among other positive benefits with no known downside.

L-theanine also:Adds unami (a brothy or savory) taste when added to water, coffee, tea, etc. Decreases bitter taste when added to coffee, tea, and other beverages and foods. Takes effect within 30 minutes after consumption. No known cautions or drug interactions

Documented Safety - L-theanine is considered to be safe based on its historical use as a component of tea and on favorable toxicology studies. Tea is the most consumed beverage worldwide after water, and has been consumed for thousands of years by billions of people. It is estimated that a heavy tea drinker (6-8 cups daily) will consume between 200 to 400 mg of L-theanine daily.

Stress and Anxiety

Stress and anxiety are debilitating conditions that can shorten life span while lessening performance, well being, and the enjoyment of life. Stress can impair the ability to perform mentally. It may result in reactions to situations that cause enhanced frustration, hostility or even injury. Stress slowly destroys the immune system, lowering resistance to disease and thus allowing degenerative and opportunistic diseases to occur. Stress is a cause of depression. The entire population is subjected to stress. In a 1998 survey, nearly 65 percent of the adult population indicated that they were under great stress. More than 23 million Americans suffer from anxiety illness.


Studies in cooperation with Taiyo Kagaku Co., The University of Shizuoka, and The Family Planning Institute of Japan have shown that women taking 200 mg L-theanine daily have lower incidence of PMS symptoms. These symptoms include physical, mental, and social symptoms. Overall, a significant alleviation of PMS symptoms by L-theanine was observed.

Brain Chemical May Thwart Ravages of Aging: Study

L-theanine appears to have a role in the formation of the inhibitory neurotransmitter Gamma Amino Butyric Acid (GABA). GABA blocks release of the neurotransmitters dopamine and serotonin, playing a key role in the relaxation effect.

Dosage: 100 to 200 mg 1 to 3 times daily or as needed depending on stress and anxiety levels.

BioSynergy L-theanine can also be poured out of the capsule into water, coffee, tea, juice, etc. as it is quickly and completely dissolved. BioSynergy L-theanine potency is not diminished with heat to at least 120 C (100 C is boiling). BioSynergy L-theanine can be taken with meals or on an empty stomach

  • Supplement Facts Serving Size 1 Capsule

     Servings Per Container 90


    Suntheanine™ (L-theanine) (pure pharmaceutical grade)

    Amount Per Serving 200

BioSynergy L-theanine - Health Emporium
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