Theanine
Theanine is an amino acid commonly found in tea, particularly green tea, and certain types of mushrooms. It is known for its ability to promote relaxation without drowsiness, making it synergistic with caffeine. It's often used to reduce stress and improve focus.
- Category
- Nootropic/Amino Acid
- Molecular Formula
- C7H14N2O3
- Mechanism of Action
- Theanine is thought to work by increasing levels of certain calming brain chemicals like GABA, serotonin, and dopamine, which contribute to mood, sleep, and emotion regulation. It also may decrease levels of chemicals linked to stress and anxiety.
- Evidence Grade
- B - Moderate evidence for efficacy
Other Names
- L-Theanine
- γ-glutamylethylamide
- 5-N-Ethyl-Glutamine
Primary Benefits
- Promotes relaxation
- Improves focus
- Enhances sleep quality
- Supports immune system
- Reduces stress
Recommended Dosage
| General |
200-400mg per day |
| Specific Conditions |
Array |
Side Effects
Precautions
- Pregnancy and breastfeeding
- Surgery
Interactions
- High blood pressure medications
- Stimulant drugs
Key References
- Nobre AC, Rao A, Owen GN. L-theanine, a natural constituent in tea, and its effect on mental state. Asia Pac J Clin Nutr. 2008;17 Suppl 1:167-8.
- Kimura K, et al. L-Theanine reduces psychological and physiological stress responses. Biol Psychol. 2007 Jan;74(1):39-45.
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