Theanine in tea

1.Improve intestinal flora and intestinal immune function.L-Theanine can help Lactobacillus, Bifidobacterium and other beneficial bacteria proliferate, inhibit the growth of harmful flora, and enhance intestinal immune function. Professor You Jinming team from Jiangxi Agricultural University found that L-theanine can improve the abundance of thick-walled bacteria and bacillus anthropophilus, increase the concentration of short-chain fatty acids in the faeces, and improve the intestinal flora disorders in the study of the effect of oral L-theanine on mice on a high-fat diet. Moreover, L-theanine can also increase the proportion of short-chain fatty acid-producing intestinal flora, such as Prevotella, Trichoderma reesei and Ruminalococcus, which can stimulate the metabolism of short-chain fatty acids, thus improving the immune function of the intestinal mucosa and enhancing the intestinal immune barrier.

2. Promotion of dopamine secretion to soothe mood and fight depression . Dopamine, a neurotransmitter associated with mood and reward, is a key substance in making people happy, and L-theanine intake can promote dopamine release to help alleviate depression.L-Theanine acts as a neurotransmitter precursor that increases the synthesis and release of dopamine.

3. Stimulate brain waves to improve sleep quality. When the brain is in deep sleep, blood periodically flows out of the brain in large quantities. Whenever the blood flows out in large quantities, the cerebrospinal fluid takes the opportunity to enter the brain for toxin cleansing, and such cleansing only occurs after a deep sleep. One study found that ingesting L-Theanine can lead to deep sleep, helping to command the brain to perform toxin cleansing. When outside of sleep, it has a relaxing, calming effect. 2011, a study in the United States showed that nearly 100 hyperactive boys used a commercially available theanine supplement (400mg per day), and then observed the effects of theanine on sleep. 6 weeks later, the group that took theanine showed significant improvements in sleep quality and duration.