The Therapeutics Of Tea: Why L-Theanine Can Help Stop Stress

In our present world, there’s no doubt that boisterousness plays a contributing role in our appointed time-to-day lives. Whether our stresses root from projects piling up at act, our relationships with family and friends or struggles by keeping up with schoolwork, learning to deal with and overcome stress is a division of life. While some stress is analogical, too much pressure can have damaging movables on the brain, body and temper, just to name a few. In occurrence, according to the American Psychological Association, 75 percent of Americans recital experiencing at least one symptom of accent every month, such as feeling peevish, anxious, unmotivated or overwhelmed. (1)

Recent studies are indicating every interesting link between stress reduction and a universal household item: tea. Tea has protracted been known as a rich beginning of flavonoid antioxidants, but its smaller-known therapeutic property is its spring of L-theanine, a non-protein amino sharp and a natural constituent in evening meal (2). Research is now showing the potential connection between L-theanine and the conversion of psychological and physical stress, equal noting a decrease in ADHD symptoms in admonish-aged boys (2). How does L-theanine act, and why does it reduce violence symptoms in higher doses?

In a designate by ~ of preliminary studies, L-theanine has been linked to touching the brain and its reaction and reply to stress positively (2,3). In studies conducted attached animals, for example, it was set up that L-theanine affected dopamine and serotonin concentrations in the brain and reduced passion pressure in hypertensive rats (3). Constituting touching one to two percent of the make ~ weight of tea, the L-theanine levels in a unbiassed serving of tea equals to not far from 20 milligrams (2). At this price, one would need to drink upwards of 10 to 15 becchanals of tea per day to do a good turn from its potential therapeutic benefits, workmanship a case for higher dosage.

In a study conducted by the Unilever Food and Health Research Institute in the Netherlands, researchers looked at L-theanine’s import on brain function through electroencephalograph (EEG) testing to teach that L-theanine significantly increases exercise in the alpha frequency band, that indicates that it relaxes the inner man without inducing drowsiness (2). EEG measurements were taken at baseline and at 45, 60, 75, 90 and 105 minutes following healthy participants ingested 50 milligrams of L-theanine and the results were noteworthy: There was a greater increase in alpha alertness in the brain across time in participants who ingested L-theanine like opposed to a placebo (2). The a~ in alpha activity in the brain indicates heightened mental alertness and attention, making a particular occurrence for the benefits of L-theanine. (2)

Another study considered L-theanine’s potency to block the binding of L-glutamic acid to glutamate receptors in the brain, that has been linked to reducing strain by inhibiting neuron excitation in the brain (3). Researchers by word of mouth administered L-theanine or caffeine to 14 subjects who were simple fellow under physical or psychological stress to touchstone their resistance to stressful situations. The results showed that L-theanine was accountable for significantly [inhibiting] the blood press increases in a high-response dispose, which consisted of participants whose fiery fellow pressure increased more than average ~ the agency of a performance of a mental oppress after a placebo intake (3). Caffeine had a uniform, but much smaller, effect on participants, more distant making the case for L-theanine’s reality on anxiety and stress on a physiological take aim. (3)

In a study published in 2013 in the diary of Pharmacology, Biochemistry and Behavior, scientists examined the anti-force effect of L-theanine on fifth year pharmacy students who were randomly administered 200 milligrams of L-theanine or a placebo pill twice a day for one week earlier to the pharmacy practice and continuing in favor of 10 days into the practice full stop (4). Generally thought of as a completestress group of individuals, the study assessed sharer anxiety levels through salivary α-amylase activity (sAA), a marker of sympathetic easily agitated system activity. By the end of the study, researchers concluded that subjective stress was significantly lower in the L-theanine arrange than the placebo group, suggesting that it does indeed be the subject of an anti-stress effect (4). Furthermore, lowered levels of subjective stress in the L-theanine clump determined that theanine intake suppressed incipient stress responses of students assigned during long-term commitment of pharmacy pursuit (4).

L-theanine is also inner reality considered as a therapeutic treatment during young children suffering from attention shortage. hyperactivity disorder (ADHD) in relation to its general intent on sleep quality. Sleep problems are a customary comorbidity associated with ADHD, and disturbed be dead is often linked to exacerbating the impair the functions of (5). The randomized, double blind, placebo-controlled study investigated the effectiveness and safety of L-theanine during the time that an aid to improving sleep capacity in 98 boys, aged 8-12 years, who had before been diagnosed with ADHD. Subjects were administered 100 milligram tablets of L-theanine or a placebo two times daily for six weeks and were evaluated notwithstanding sleep problems for five consecutive nights at baseline and at the expiration of the six weeks. Surprisingly, the study erect that boys who consumed L-theanine obtained significantly higher nap percentage and sleep efficiency scores, along with a non-significant trend notwithstanding less activity during sleep, defined like less time awake after sleep assault (5). Not only did the study splendor improvements in sleep patterns, the with reference to something else high dose of L-theanine that was administered immersing this time period was well tolerated and didn’t likeness significant adverse effects (5). This study indicates a plausibly place of ~ty method of therapy for young children with ADHD with naturally derived L-theanine. (5)

While it is moreover soon to make definitive conclusions from this preliminary examination, trends are pointing in favor of L-theanine as a therapeutic agent in combating inclemency levels and even behavioral disorders like ADHD. So remoter, L-theanine has shown minimal opposing side effects on young patients, fabrication it an especially compelling form of therapy because researchers to look into in the that will be. If you’re considering taking L-theanine, have existence sure to consult your doctor precedent to beginning a new regimen.


1. Anderson, N. B., PhD, Belar, C. D., PhD, & Breckler, S. J., PhD. (2015, February 4). Stress In America: Paying With Our Health. Retrieved April 19, 2016 from

2. Nobre AC, Rao A, Owen GN. L-theanine, a artless constituent in tea, and its consequence on mental state. Asia Pac J Clin Nutr. 2008;17 Suppl 1:167-8.

3. Yoto A, Motoki M, Murao S, Yokogoshi H. Effects of L-theanine or caffeine intake put ~ changes in blood pressure under pertaining to physics and psychological stresses. J Physiol Anthropol. 2012;31:28.

4. Unno K, Tanida N, Ishii N, et al. Anti-importance effect of theanine on students for the period of pharmacy practice: positive correlation among salivary α-amylase activity, trait anxiety and subjective stress. Pharmacol Biochem Behav. 2013;111:128-35.

5. Lyon MR, Kapoor MP, Juneja LR. The goods of L-theanine (Suntheanine®) on belonging to sleep quality in boys with alertness deficit hyperactivity disorder (ADHD): a randomized, double-remote, placebo-controlled clinical trial. Altern Med Rev. 2011;16(4):348-54.

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