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Amino Acids
L-Theanine
Amino acid from tea; promotes calm focus without drowsiness.
What it is
L-Theanine is an amino acid found naturally in tea leaves. It promotes relaxation and alpha brain wave activity without sedation.
How it works
Increases alpha brain wave activity; modulates GABA, serotonin, and dopamine levels for calm alertness.
What the evidence says
Moderate evidence for promoting relaxed alertness; well-studied synergy with caffeine for focus.
Safety Notes
- Very well-tolerated. 100-200 mg with caffeine is a popular nootropic stack.
- blood pressure medications: May slightly lower blood pressure; monitor.
Timing With Other Supplements
- Caffeine: Synergistic pairing; L-theanine smooths caffeine's stimulatory edge.