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Zen Theanine is L-theanine, a unique amino acid found primarily in green tea. Studies show that theanine supports alpha-wave brain activity, associated with states of relaxed, peaceful wakeful alertness observed during meditation and biofeedback.
AOR Zen Theanine 60 vcaps
Zen Theanine - 60 vcaps, aor vitamins supplements
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AOR Zen Theanine
- Helps maintain a relaxed state of mind
- Supports cognitive function
AOR Zen Theanine is L-theanine, a unique amino acid found primarily in green tea. Studies show that theanine promotes calm, relaxed alertness.
|Serving Size: 1 Capsule
|Amount Per Serving
|L-theanine (green tea extract)
|Non-medicinal ingredients: Capsule: hypromellose.
that no ingredients not listed on the label have been added to the
product. Contains no wheat, gluten, corn, nuts, dairy, soy, eggs, fish
or shellfish or any animal byproduct.
Adult Dosage: Take 1 capsule daily without food, or as directed by a qualified health care practitioner.
Cautions: None known
Pregnancy/Nursing: Do not use
- Cognitive function
What Is L-Theanine?
is a rare amino acid. This amino acid, with apparently only one
exception, is found only in certain species of tea plants. It
constitutes between 1 and 2% of the dry weight of tea leaves and
accounts for approximately one half of all the free amino acids present
in the leaves. First discovered in 1949, L-theanine not only is an
important health-giving constituent of tea, but also is the major flavor
component of green tea.
The Relaxation Factor
have often wondered why it is that tea, despite its caffeine content,
tends to relax individuals without making them drowsy. Similarly, those
engaging in meditation practices may drink tea to dispel mental
sluggishness and yet not become mentally agitated, as is typical with
the consumption of too much coffee. L-theanine appears to be the
component in green tea which is responsible for these particular
benefits. This is good news for the 65% of adult Americans who suffer
from daily stress.
Alpha Brain Waves
Various tests have demonstrated the anti-stress effects of L-theanine.
One of the more revealing of these experiments examined brain wave
patterns after the ingestion of L-theanine. This research built upon the
knowledge that humans produce specific patterns of electrical pulses on
the surface of the brain which mirror brain states. The four primary
wave patterns are known as the alpha, beta, delta and theta (a, b, d and
q) brain waves, representing, respectively, 1) relaxed wakefulness, 2)
excitation, 3) sound sleep, and dozing sleep.
50 women volunteers
(aged 18-22 years old) were divided into high-anxiety and low-anxiety
groups. Each group was given either 50 or 200 mg L-theanine in water
once a week. Their brain waves were measured during the 60 minutes after
ingestion. The measurements were repeated twice during a two-month test
period. The results were a marked increase in alpha-waves starting
roughly 40 minutes after ingestion. Researchers concluded that
L-theanine rapidly enters the system when ingested and that it heightens
the index of the brain wave which is known to be linked to a state of
relaxed wakefulness. Researchers also have explored whether the response
to L-theanine might be influenced by the level of anxiety found in test
subjects. As might be expected, the greater degree of change is found
in those manifesting high anxiety.
tests have been used to find out if L-theanine exerts an impact upon
memory and learning ability. In one memory experiment based upon learned
avoidance, both active and passive in nature, the L-theanine-treated
animals were more successful than controls, and their superiority
increased in proportion to the number of tests. In another test which
measured learning ability, the L-theanine-treated animals, similarly,
out-performed the controls, especially as the tests became more
experiments have attempted to determine how L-theanine achieves its
benefits in the areas of relaxation and learning. These tests have shown
that the amino acid influences the levels of neurotransmitters in the
brain. The metabolism of dopamine and serotonin is influenced by
L-theanine, furthermore, appears to protect against certain so-called
“excitotoxins.” It modulates the motor-stimulation associated with
caffeine, and it inhibits some of the actions of norepinephrine in the
central nervous system, for instance. In tests with gerbils, L-theanine
protected against the destruction of neurons in induced ischemia, a
condition which can lead to a rapid increase in glutamate in neurons and
result in the death of these cells.
Benefits for the Liver
another trial with L-theanine looked at its effects upon liver health. A
known liver toxin, D-galactosamine, was employed. L-theanine was shown
to be active in preventing injury to the liver, whereas glutamine in
equal amounts showed no protective effect. Studies using other models of
liver injury also have demonstrated benefits.
is an amino acid which is found in green tea. People use theanine for
treating anxiety and high blood pressure, for preventing Alzheimer’s
disease, and for making cancer drugs more effective.
is one of the primary components of tea that gives it its relaxing and
healthful properties. AOR’s Zen Theanine provides an optimal dose of
this remarkable amino acid. Zen Theanine is fast-acting, and its calming
effects can be felt within 1 hour of consumption.
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.
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.
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.
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.
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.
Kobayashi M. “Hypotensive effect of gamma-glutamylmethylamide in
spontaneously hypertensive rats.” Life Sci. 1998; 62(12): 1065-8.
T, Dong E. “Influence of green tea and its three major components upon
low-density lipoprotein oxidation.” Exp Toxicol Pathol. 1997 Dec; 49(5):
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