L-Theanine 200mg, 60 Capsules, Olympian LabsOlympian Labs L Theanine Dietary Supplement. 200 mg Caps. L Theanine (5 N ethylglutamine) is a unique free form amino acid found in green tea. L Theanine is the predominant amino acid in green tea and makes up 50% of the total free amino acids in the plant. L Theanine is a relaxant that increases alpha waves producing mental and physical relaxation decreasing stress and anxiety, without inducing drowsiness. L Theanine is a building block for gamma