L-Theanine is a non-protein amino acid most commonly found in green tea leaves. It is best known for its calming and focus-enhancing effects, often used to reduce stress without causing drowsiness.
In fitness and performance settings, L-Theanine is valued for improving mental clarity, focus, and reducing pre-competition anxiety. When combined with caffeine, it can promote a balanced state of alertness and concentration.
It’s particularly popular in pre-workouts and nootropic blends for athletes who require both physical energy and mental sharpness.
Synonyms:
Theanine
Benefits:
- Promotes relaxation without sedation
- Enhances mental focus and cognitive performance
- Reduces stress and anxiety, especially under pressure
- Synergizes with caffeine for smooth energy
- May support sleep quality and recovery
Sources:
Naturally found in green tea (Camellia sinensis). Also available as an isolated supplement.
Observations:
Often included in nootropic and focus-enhancing supplements. Effective dosages range from 100mg to 400mg. Generally well tolerated; high doses may cause mild drowsiness in some users.
Areas of Study Related:
Neuroscience, Cognitive Psychology, Sports Psychology, Nutraceuticals.