Cesareo, K. ., T. . Ziegenfuss, B. . Raub, J. . Sandrock, and H. Lopez. “Effects of Purple Tea on Muscle Hyperemia and Oxygenation, Serum Markers of Nitric Oxide Production and Muscle Damage, and Exercise Performance”. Journal of Exercise and Nutrition, vol. 3, no. 3, July 2021, https://journalofexerciseandnutrition.com/index.php/JEN/article/view/71.