L-Theanine
Also known as: Theanine, γ-glutamylethylamide
L-theanine is an amino acid found naturally in tea leaves. It promotes relaxation without drowsiness and is often combined with caffeine for focused, calm energy. It's one of the most well-researched calming supplements.
Potential Benefits
- Promotes relaxation without sedation
- May reduce stress and anxiety
- Combines well with caffeine for focused energy
- May improve sleep quality
- May support attention and focus
What Research Shows
Good evidence for relaxation and anxiety reduction. Strong evidence for synergy with caffeine. Sleep benefits are supported but effects are modest.
Dosage Information
100-200mg for relaxation; 100-200mg with caffeine for focus; up to 400mg for sleep
Note: Optimal dosing may vary based on individual factors. Always follow product label instructions or consult a healthcare provider.
Side Effects
- Generally very well tolerated
- Rare: headache, dizziness
- May enhance sedative effects of other substances
Drug Interactions
- May enhance sedative medications
- May lower blood pressure (caution with BP meds)
Natural Sources
Products Containing L-Theanine
Medical Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before taking any supplement, especially if you have medical conditions or take medications.