An increase in brain dopamine concentration was also observed with theanine administration. For example, intraperitoneal administration of 1740 mg/kg of L-theanine produced a decrease in norepinephrine levels. Various animal studies have shown that L-theanine affects the levels of various neurotransmitters in the brain. Theanine can cross the blood-brain barrier and is similar to the proteinogenic amino acid L-glutamine, which is decarboxylated in the central nervous system by the enzyme L-glutamic decarboxylase to γ-aminobutyric acid (GABA), an important neurotransmitter. Another study conducted in Japan in 2006 confirmed the relaxing effect of L-theanine on humans. In addition, they recalled some previous studies on rats, which had shown that L-theanine had a positive effect on the learning performance and memory of the animals. Scientists have stated that L-theanine and therefore the consumption of green tea have a stress-reducing effect. This product allows you to relax, but without causing drowsiness. In a study by the University of Shizuoka in Japan, it was shown as early as 1999 that L-theanine stimulates alpha waves in the brain. What happens is the often described effect of green tea: it wakes you up gently, is not as stimulating as coffee, and relaxes you at the same time. This is where L-theanine comes in, which is supposed to be able to neutralize the negative effects of caffeine. In high doses, the substance can cause palpitations, inner turmoil, insomnia, and increased blood pressure. Caffeine stimulates the mind, but it also has side effects that can be unpleasant for people who are intolerant to it. Scientists have discovered that L-theanine in tea is the counterpart of caffeine. Faced with the restlessness of the modern world, laboratories specialized in food supplements have indeed wished to offer this health product even to those who do not drink tea, because of its benefits on the brain and its health potential. However, it is now available in capsule form containing extracts. The best way to consume the amino acid L-theanine is therefore to drink tea. #Theine effects free#Together with glutamine and other free amino acids, theanine forms the non-protein component of the plant. It is synthesized in the roots of the tea plant from glutamic acid and ethylamine by theanine synthetase, then transported to the leaves, where it is stored. Theanine is present not only in Camellia sinensis but also in Camellia japonica and sasanqua species. L-theanine is a colorless, water-soluble, non-proteinogenic amino acid that co-determines the taste of the beverage tea. After one minute, more than 50% of the total extractable theanine is already in solution. This amino acid is extracted by the hot water of the infusion in a few moments. L-theanine was first isolated and identified in 1949 by the Japanese researcher Y. It is consumed to calm stress, promote sleep and concentration. L-theanine is an amino acid that has many benefits for the brain. Should I Choose Organic Theanine? Presentation Of L-Theanine.Can L-Theanine Be Combined With Other Medications To Promote Sleep?.
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