💊 Other · Limited evidence
Suntheanine L Theanine
Calming amino acid found in tea. People take it for:
- Relaxation and stress reduction (small studies)
- Relaxation before bed (it does not appear to cause sleep)
- Calm focus (results are not definitive)
Why it works
People take it for relaxation, stress and sleep. L-theanine is an amino acid found in tea leaves. Small, short studies suggest it may support relaxation, but results for sleep and focus are not definitive, and larger studies are needed.
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How to take Suntheanine L Theanine
Best time to take
as-needed
Suggested dose
100mg per capsule
Side effects and risks
- Can cause drowsiness or headaches
- May add to the effect of blood pressure medicines and sedatives
- Not enough safety data in pregnancy or breastfeeding, so avoid it unless a provider approves
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Medical disclaimer: Nothing on Stack Ritual constitutes medical advice. The information provided is for educational purposes only. Always consult your doctor or a qualified healthcare provider before beginning, changing, or stopping any vitamin, supplement, or wellness regimen.