Kyle J. Norton
Green tea may have a potential and positive effect in treating mood disorders, some scientists suggested.
Mood disorder is a psychological condition characterized by an elevated mood, including mania or hypomania. In other words, a syndrome is a group of mental illnesses that can affect how a person feels and thinks of him/herself and people in public life.
A mood disorder can be classified into depression, dysthymic disorder,... and bipolar disorder depending on the symptoms of expression.
The condition not only affects the personal life of the patient but also causes psychological and financial burdens to the immediate family members as the condition can only get worse over time.
According to the statistics in 2017, over 2.6 million Canadians aged 12 and over were diagnosed with mood disorders, affecting over 8% of the general population. Sadly, about one in seven Canadians will experience a mood disorder at some point in their life.
The exact causes of mood disorders are unknown, however, there are some underlying factors that can elevate the risk of the condition, including family history, previous mood disorder, depression, certain medical conditions, and long-term use of some medication.
Symptoms of mood disorders are totally depending on the type of the syndrome. If you are experiencing symptoms of feelings of hopelessness, long-term trouble sleeping or daytime sleepiness, poor concentration, and trouble concentrating or making decisions accompanied by physical symptoms of fatigue or low energy, you may have mood disorders. Please check with your doctor to rule out the possibility.
Green tea, a precious drink processes a number of health benefits known to almost everyone in Asia and the Western world.
In the concerns of the widespread mental disorders, researchers at Elsevier Launched an investigation to examine the effects of green tea or green tea extracts, l-theanine and epigallocatechin gallate both components of green tea on general neuropsychology, on the sub-category cognition and on brain functions in humans.
By searching the database of medical literature in PubMed for qualified studies that satisfy the guidelines and criteria set by the PRISMA statement.
Out of 21 selected studies, 4 were randomized controlled trials, 12 were cross-over studies (both assessed with an adapted version of the DELPHI list), 4 were cross-sectional studies and one was a cohort study (both assessed with an adapted version of the Newcastle-Ottawa assessment scale).
After assessing the results of all studies, researchers found that injection of green tea exerts a significant effect on psychopathological symptoms (e.g. reduction of anxiety), cognition (e.g. benefits in memory and attention), and brain function (e.g. activation of working memory seen in functional MRI).
Further analysis also suggested that the effects of green tea may be attributed to the combined influence of both caffeine and l-theanine, as separate administration of either substance is found to have a lesser impact.
Moreover, in the systematic review and meta-analysis conducted on 11 randomized placebo-controlled human studies of acute effects of tea constituents L-theanine and epigallocatechin gallate, administered alone or in combination with caffeine, on cognitive function and mood, researchers discovered that* Combined caffeine and L-theanine demonstrated some moderate effects in the first 2 hours postdose, on ladder alertness, attentional switching accuracy, and, to a lesser extent, some unisensory and multisensory attentional outcomes.
* Caffeine and L-theanine doses revealed trends toward greater change in effect size for caffeine dose than for L-theanine dose, particularly during the first hour postdose.
Additionally, in the study to evaluate whether the tea has any effect on mood and performance benefits, such as relaxation and concentration, researchers at Unilever Research and Development also conducted an extensive search of studies with consistent evidence for improved attention.
In the final report, researchers concluded after taking into account co and confounders
* Tea consumption also consistently improved self-reported alertness and arousal, whereas effects on pleasure or relaxation were less consistent.
* Intake of tea regularly has a strong impact on psychological functions such as work performance and creativity.
The findings suggested that moderate green tea consumption regularly and daily has significant acute benefits in both mood and performance in real-life situations.
Taken all together, there is no doubt that green tea containing a number of highly bioactive compounds such as caffeine, l-theanine, and epigallocatechin gallate may be considered a functional food to protect the brain functioning against the onset of mood disorders.
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Author Biography
Kyle J. Norton (Scholar, Master of Nutrition, All rights 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 the international journal Pharma and Bioscience, ISSN 0975-6299.
Sources
(1) Green tea effects on cognition, mood, and human brain function: A systematic review by Mancini E1, Beglinger C2, Drewe J2, Zanchi D1, Lang UE1, Borgwardt S3(PubMed)
(2) Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis by Camfield DA1, Stough C, Farrimond J, Scholey AB(PubMed)
(3) Acute effects of tea consumption on attention and mood by Einöther SJ1, Martens VE. (PubMed)
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