Product name: L-Theanine
Appearance: White crystalline powder
CAS NO.: 3081-61-6
EINECS No.: 221-379-0
Molecular formula: C7H14N2O3
Molecular weight: 174.1977
Test method: HPLC
Theanine may help reduce the negative effects of stress, according to a small study published in Biological Psychology in 2007. In an experiment involving 12 people, researchers found theanine-treated participants were less likely to experience an increase in heart rate when performing a stressful task.
Taking green-tea-derived theanine and antioxidants in supplement form may help prevent the flu, suggests a study published in BMC Complementary and Alternative Medicine in 2011. Every day for five months, the study's 197 participants took either a placebo or a capsule containing theanine and catechins (a class of antioxidants found in green tea).
3) Brain Health
A 2010 study from Nutritional Neuroscience suggests that a combination of theanine and caffeine may help improve cognitive performance. For the study, 44 young adults took either a placebo or a combination of theanine and caffeine prior to performing a demanding cognitive task. Researchers found that the combination of theanine and caffeine significantly improved accuracy and alertness and helped to increase focus while performing the task.
Additionally, findings from an animal-based study published in Free Radical Biology & Medicine in 2009 suggest that theanine may inhibit buildup of amyloid beta (a substance that forms the brain plaques associated with Alzheimer's disease).
Theanine may help relieve depression, according to an animal-based study published in Phytotherapy Research in 2011. In tests on mice, scientists discovered that theanine produced an "antidepressant-like effect."
5) Weight Loss
Theanine shows promise as a weight loss aid, according to animal-based research published in the journal In Vivo in 2004. In an experiment involving mice fed green tea powder, researchers found that theanine and caffeine found in the powder appeared to prevent weight gain and fight the buildup of fat.
Theanine (L-Theanine) is a unique free amino acid in tea. Theanine is glutamic acid γ-ethylamide, which has a sweet taste. Theanine content varies according to the type and location of tea. Theanine accounts for 1%-2% by weight of dry tea. Theanine is similar in chemical structure to the active substances in the brain, glutamine and glutamic acid, and is the main ingredient in tea. Theanine content is about 1% to 2% of the new tea, and its content decreases with the fermentation process.
When measuring the effect of theanine on the metabolism of monoamines in various parts of the brain, Hengyue et al. found that theanine can significantly promote the release of dopamine in the brain and improve the physiological activity of dopamine in the brain. Dopamine is a central neurotransmitter that activates brain nerve cells, and its physiological activity is closely related to human emotional state. Although people do not know the mechanism of theanine in the central nervous system of the brain. But the influence of theanine on spirit and emotion undoubtedly comes from the effect on the physiological activity of the central neurotransmitter dopamine. Of course, the anti-fatigue effect of drinking tea is also believed to come from this effect to a certain extent.