Your guide to the tea‑derived amino acid that’s gaining traction for stress relief, focus, and sleep. Alt text: Green tea cup and fresh tea leaves, the primary natural source of L‑theanine. Table of Contents What Is L‑Theanine? How L‑Theanine Works in the Body Proven Benefits (Peer‑Reviewed Evidence) [Possible or Emerging Benefits (Limited Research)]#possible-benefits) Recommended Dosage…