Frontiers L Theanine: A Unique Functional Amino Acid in Tea (Camellia sinensis L.) With Multiple Health Benefits and Food Applications The smart pre workout FULL CHURN features L Theanine to help super CALM and FOCUSED energy throughout your workout! L theanine in your pre workout helps to enhance mental clarity, reduce stress, and balance L Carnitine vs L Arginine: Understanding Their Differences and Benefit Fitness Health Functional roles of taurine, L theanine, L citrulline, and betaine during heat stress in poultry Journal of Animal Science and Biotechnology Springer Nature Link