L-Theanine
Amino AcidsKey Benefits
How It Works
L-Theanine (found in green tea) crosses the blood-brain barrier and increases alpha brain wave activity, promoting relaxed alertness. It modulates GABA, serotonin, and dopamine levels, and inhibits glutamate excitotoxicity. Structurally similar to glutamate.
Dosage & Timing
Recommended Dosage
100-400 mg daily
Best Time to Take
Morning with caffeine for focus, or evening for relaxation
Recommended Form
Suntheanine branded L-Theanine
Side Effects
Extremely safe. No known side effects at normal doses. May cause mild drowsiness in sensitive individuals.
Drug Interactions
Enhances calming effects of sedatives. Synergistic with caffeine (most popular nootropic stack). No significant negative interactions.
What Does The Research Say?
Human studies show significant anxiety reduction, improved attention, and enhanced alpha wave activity. The L-theanine + caffeine stack is the most well-validated nootropic combination in research. 200mg theanine + 100mg caffeine is the gold standard ratio.
Where to Buy
Buy L-Theanine on Amazon
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This information is for educational purposes only and does not constitute medical advice. Researched by The NexoraOS Team, supplement user since 2018. Always consult a qualified healthcare professional before starting any supplement. Individual results may vary. Amazon links are affiliate links.