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Systematic (IUPAC) name
2-Amino-4-(ethylcarbamoyl)butyric acid
CAS number 3081-61-6
ATC code none
PubChem 228398
ChemSpider 388498
Chemical data
Formula C7H14N2O3 
Mol. mass 174.20 g/mol
SMILES eMolecules & PubChem
Synonyms L-theanine, N-ethyl-L-glutamine
Physical data
Melt. point 117 °C (243 °F)
Pharmacokinetic data
Bioavailability ?
Metabolism ?
Half life ?
Excretion ?
Therapeutic considerations
Pregnancy cat.


Legal status


Routes oral

Theanine is a chemical that you find in tea and in some mushrooms. Theanine is an amino acid. The chemical theanine can change your mood, behavior and the way you see or feel things. It lowers stress and it is also an antioxidant. This is a good chemical that fights aging. Theanine helps the immune system. This protects your body against diseases.