Green tea intake regularly may have a potential influence on many aspects of the brain functions some scientists suggested.
The brain and the spinal cord form a central nervous system that consists of the ability to control our thoughts, memory, and speech, muscles, and the function of many organs.
People with brain impairment caused by a disease or injury may experience the decline of some conscious mental activity, including speech, learning, and memory. In severe cases, patients may also have reduced daily function and independence.
In neurodegenerative disease, the progressive death, and loss of neurons function that affects the different regions of the brain may facilitate memory loss, forgetfulness, apathy, anxiety, agitation. a loss of inhibition and mood changes. In severe cases, the disease can cause a substantial reduction of the quality of life.
As of today, the treatment of neurodegenerative disease in conventional medicine is limited only to the symptoms. None of the currently available therapies slow or stop the continued loss of neurons.
Green tea, a precious drink processes a numbers of health benefits known to almost everyone in Asia and the Western world.
With an aim to find a natural and potential source that processes the ability in enhancing brain function, researchers at the University of South Australia conducted a review of the association between two dietary components of tea, caffeine, and L-theanine, and the psychological outcomes of consumption.
After taking an assessment of all the selected studies, researchers found that caffeinated tea, injecting at regular intervals, maintains alertness, focused attention, and accuracy and may modulate the more acute effects of higher doses of caffeine.
The interaction of L-theanine on the brain and caffeine exerted the neurochemical effects to enhance performance in terms of attention switching and the ability to ignore the distraction,
However, although, injection of tea stimulated a higher-level cognitive activity, caffeinated tea can cause detrimental effects to the brain as a result of overstimulation
Additionally, the in-depth differentiation of L-theanine in the modulation of the aspects of brain function suggested* L-theanine found in the tea has a direct effect on the brain.
* L-theanine significantly increases activity in the alpha frequency band which indicates the relaxation of the mind without inducing drowsiness.
These results were provided by the final report of EEG recording in the study of young participants with rest at the baseline and 45, 60, 75, 90 and 105 minutes after ingestion of 50mg L-theanine (n=16) or placebo (n=19). The similar results also observed even when the subjects engaged in a passive activity.
Benefits of the increase of Alpha Brain Waves are the deep relaxation of body and mind accompanied with no stresses and worries.
Intesterestly, in the study to examine whether L-theanine injection reduced stress by blocking the binding of L-glutamic acid to glutamate receptors in the brain, researchers launched an investigation including fourteen participants each underwent three separate trials, in which they orally took either L-theanine + placebo, caffeine + placebo, or placebo only.
All participants were assessed on mental task performance and physiological activities under conditions of physical or psychological stress in humans.
Application of L-theanine significantly inhibited the blood-pressure increase in a high-response group, which consisted of participants whose blood pressure increased more than average by the performance of a mental task after placebo intake.
Caffeine exerted a similar but smaller inhibition of the blood-pressure increase caused by the mental tasks.
Also, according to the Profile of Mood States after the mental tasks, L-theanine reduced the Tension-Anxiety scores as compared with placebo intake.
These results suggested that the application of green tea L-theanine not only reduces anxiety but also attenuates the increase in the levels of stress.
Taken all together, there is no doubt that moderate consumption of green tea or tea with an abundant of L-theanine processes a positive and profound effect in enhancing brain function in many aspects. However, excessive green tea and tea drinking may cause overstimulation.
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Author Biography
Kyle J. Norton (Scholar, Master of Nutrition, All right reserved)
Health article writer and researcher; Over 10.000 articles and research papers have been written and published online, including worldwide health, ezine articles, article base, health blogs, self-growth, best before it's news, the karate GB daily, etc.,.
Named TOP 50 MEDICAL ESSAYS FOR ARTISTS & AUTHORS TO READ by Disilgold.com Named 50 of the best health Tweeters Canada - Huffington Post
Nominated for shorty award over last 4 years
Some articles have been used as references in medical research, such as international journal Pharma and Bioscience, ISSN 0975-6299.
Sources
(1) Psychological effects of dietary components of tea: caffeine and L-theanine by Bryan J1.(PubMed)
(2) L-theanine, a natural constituent in tea, and its effect on mental state by Nobre AC1, Rao A, Owen GN.(PubMed)
(3) Effects of L-theanine or caffeine intake on changes in blood pressure under physical and psychological stresses by Yoto A1, Motoki M, Murao S, Yokogoshi H.(PubMed)
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