L-Theanine is widely used in Asian countries to combat various medical and mental health problems, and it is rapidly gaining popularity in Western countries.
Caffeine, another major component in tea, may raise levels of acetylcholine and dopamine in the brain, which may improve focus, cognition, and mood.
In terms of cognitive benefits, caffeine was more effective than it because it was absorbed more quickly, reaching peak plasma levels after 30 minutes, compared to plasma levels 50 minutes after L-theanine ingestion compared to peak levels.
In addition to theanine and caffeine, tea contains other ingredients that may provide various health benefits.
1. Amino acids
6. Phenolic compound epigallocatechin
7. Epicatechin gallate
9. Epigallocatechin gallate (so-called ‘catechin’).
Matcha is a special green tea product that contains higher levels of beneficial phytochemicals than regular green tea.
Animal and human studies have shown that L-theanine may reduce subjective stress responses, improve cognition, optimize sleep, and may have protective effects against chronic disease, cardiovascular disease, obesity, and common cold.
Various green tea components, including L-theanine, caffeine, and catechins, may help prevent metabolic syndrome and obesity.
L-theanine may reduce oxidative damage caused by reactive oxygen species (ie, “free radicals”), increase glutathione concentrations in the liver, and enhance the ability of liver enzymes such as superoxide dismutase to remove toxins from the blood .
The findings suggest that L-theanine may have anti-aging properties.
Catechins from green tea may have beneficial antimicrobial and antiviral activity.
In the gastrointestinal tract, green tea has been shown to potentially activate intracellular antioxidants and suppress the formation of pro-carcinogens.
L-Theanine and Neuropsychiatric Diseases
L-theanine has been shown to potentially improve learning, memory, and cognitive function, and enhance selective attention in mental tasks.
Epidemiological studies suggest that regular consumption of tea made from camellia leaves may be associated with a lower incidence of cognitive decline, improved mood, and increased ability to cope with stress.
It may be a promising enhancement therapy for schizophrenia and may be beneficial for mood disorders, attention deficit hyperactivity disorder (ADHD), as well as panic disorder, obsessive-compulsive disorder (OCD), and bipolar disorder.
Because It is often ingested along with caffeine and other bioactive components in tea, most studies have investigated the combined effects of L-theanine and caffeine on mood and cognition.
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