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L-theanine is a rare amino acid. This amino acid, with apparently only one exception, is found only in certain species of tea plants. It constitutes between 1 and 2% of the dry weight of tea leaves and accounts for approximately one-half of all the free amino acids present in the leaves.
Zen Theanine is recommended for people in need of a natural anti-stress than can help to regulate mood.
Yet another trial with L-theanine looked at its effects upon liver health. A known liver toxin, D-galactosamine, was employed. L-theanine was shown to be active in preventing injury to the liver, whereas glutamine in equal amounts showed no protective effect. Studies using other models of liver injury also have demonstrated benefits.
L-theanine, furthermore, appears to protect against certain so-called "excitotoxins." It modulates the motor-stimulation associated with caffeine, and it inhibits some of the actions of norepinephrine in the central nervous system, for instance. In tests with gerbils, L-theanine protected against the destruction of neurons induced ischemia, a condition which can lead to a rapid increase in glutamate in neurons and result in the death of these cells.
Medicinal ingredient: 225 mgL-theanine
Non-medicinal ingredient: Capsule: hypromellose.
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We strive to provide accurate product information, but manufacturers may sometimes change their ingredient lists, which may result in differences between the information displayed on our website and the information on the product packaging. We recommend that you do not rely solely on the information presented on the site and always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. The information provided on this site is for reference purposes only and does not replace the advice of a licensed healthcare professional. You should not use this information to diagnose or treat a health problem or disease. Contact a healthcare professional immediately if you suspect you have a health problem.