L-theanine exists only in tea-producing plants in nature, accounting for between 1% and 2% of the dry weight of tea leaves. It exists in a free form and is the main amino acid in tea, accounting for 50% of all free amino acids. L-theanine is necessary for the human body, but it cannot be synthesized in the human body and must be supplied by the outside world.
In health products, L-theanine is often used, so what are its effects?
1. Soothe the nerves
Studies have shown that L-theanine has an antagonistic effect on caffeine. Clinical trials have found that alpha waves appear in the brains of the subjects after taking L-theanine, indicating that L-theanine can make people relax and calm.
2. Promote brain function
L-theanine can affect the function of the human brain. After taking theanine, people's memory ability can be improved. This is because L-theanine affects the activity of the central neurotransmitter 5-hydroxytryptamine in the brain. It is related to learning and memory.
3. Reduce blood pressure
Experimental results show that L-theanine also has an effect on the synthesis and decomposition of brain serotonin, which can reduce the synthesis of serotonin and increase its decomposition, or inhibit its release. After taking L-theanine, the content of serotonin in the brain is significantly reduced.