SleepCited

L-Theanine for Anxiety-Related Sleep Problems

B Moderate

Based on 2 studies (1 meta-analysis). 2/2 studies show positive effects.

Key Statistics

2

Studies

--

Participants

↑

Positive

B Moderate

Grade

Referenced Papers

Medicinal herbs for the treatment of anxiety: A systematic review and network meta-analysis. Meta-Analysis
Pharmacological research 2022 51 citations
Formulations of dietary supplements and herbal extracts for relaxation and anxiolytic action: Relarian. Review
Medical science monitor … 2009 85 citations

Dosage & Usage

Commonly Used Dosages

sleep:
200-400 mg, 30-60 min before bed

Upper limit: Not established; generally safe up to 900 mg/day

Dosages Studied in Research

Dosage Duration Effect N
Various medicinal herbs: Silexan, Kava, Ginkgo biloba, Withania somnifera, Galphimia glauca, Passion -- Positive --

Best taken: 30-60 minutes before bed

Safety & Side Effects

Reported Side Effects

  • ⚠ Headache
  • ⚠ Dizziness
  • ⚠ GI discomfort

Known Interactions

  • ● Blood pressure medications — L-theanine may lower blood pressure
  • ● Stimulants (caffeine) — may partially counteract stimulant effects
  • ● Sedatives — potential additive calming effects

Tolerable upper intake: Not established; generally safe up to 900 mg/day

Always consult your healthcare provider before starting any supplement.

Frequently Asked Questions

Does L-Theanine help with Anxiety-Related Sleep Problems?
Based on 2 studies with 0 participants, there is moderate evidence from clinical studies that L-Theanine may support Anxiety-Related Sleep Problems management. Our evidence grade is B (Moderate).
How much L-Theanine should I take for Anxiety-Related Sleep Problems?
Studies have used various dosages. A commonly studied range is 200-400 mg, 30-60 min before bed. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of L-Theanine?
Reported side effects may include Headache, Dizziness, GI discomfort. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for L-Theanine and Anxiety-Related Sleep Problems?
We rate the evidence as Grade B (Moderate). This rating is based on 2 peer-reviewed studies with 0 total participants. The overall direction of effect is positive.

Related Evidence

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.