200 mg taken shortly before bed to promote relaxation.

Avoid products with long lists of artificial colors, preservatives, or unnecessary fillers. Top Product Recommendations Based on recent expert reviews and specific use cases: Best Overall / Just L-Theanine: Swanson Suntheanine

offers a popular 2:1 ratio (theanine to caffeine) for alert focus without the crash. Bulk Supplements L-Theanine Powder

L-theanine may interact with blood pressure medications, stimulants, or sedatives like Valium or Ambien, potentially increasing drowsiness.

Always consult a healthcare provider before starting a new supplement, especially if you: