Theanine

Theanine or L-theanine, also known as boletus badius, camellia sinensis, gamma-ethylamino-L-glutamic acid or suntheanine, is an amino acid found in green tea that is sometimes taken as a herbal or alternative medicine.

Uses
Theanine is has suggested for:
 * Anxiety
 * Brain fog symptoms, e.g. to improve concentration and memory in combination with green tea extract or caffeine
 * Improving response to conventional cancer treatment or reducing cancer treatment side effects
 * Depression
 * Insomnia

Availability
Theanine is inexpensive and available over the counter.

Evidence
Evidence is limited for most suggested uses and some trials have reported no benefits or mixed results.

Learn more

 * L-theanine - Memorial Sloan Kettering Cancer Center
 * L-theanine - drugs.com