Summary:
L-Theanine is a non-dietary amino acid and one of the main ingredients in green tea. Being a non-protein amino acid, it is not used by the body to make enzymes.
Effects:
- May improve cognition and brain function
- Helps with stress
- Improves symptoms of depression
- May improve symptoms of schizophrenia
- May help with asthma and airway inflammation
References:
- The Neuropharmacology of L-theanine(N-ethyl-L-glutamine): A Possible Neuroprotective and Cognitive Enhancing Agent
- Effects of Chronic L-Theanine Administration in Patients With Major Depressive Disorder: An Open-Label Study
- Effect of L-theanine on Glutamatergic Function in Patients With Schizophrenia
- Inhibitory Effects of L-Theanine on Airway Inflammation in Ovalbumin-Induced Allergic Asthma