L-Theanine is a non-protein amino acid commonly found in tea leaves, known for its calming and relaxing effects. It promotes relaxation without causing drowsiness, making it a popular ingredient in supplements aimed at reducing stress and improving focus.
L-Theanine works by increasing the production of GABA, serotonin, and dopamine, neurotransmitters that regulate mood and cognitive function. It is often combined with caffeine to enhance mental clarity and focus while reducing jitteriness.
While L-Theanine is generally safe, excessive intake may cause mild side effects such as headaches or dizziness.
Synonyms: Theanine, Suntheanine
Benefits:
- Promotes relaxation and reduces stress
- Enhances focus and mental clarity
- Improves sleep quality
- May support cognitive function
- Reduces caffeine-induced jitters
Sources: Green tea, black tea, and dietary supplements like capsules or powders.
Notes: L-Theanine is often included in nootropic or stress-relief supplements. Excessive intake is rare but may cause mild side effects.
References: Study on L-Theanine and stress reduction