“Effects of Casein Hydrolysate Containing Val-Pro-Pro and Ile-Pro-Pro on Muscle Pump, Muscle Hypertrophy, and Motivation in Resistance-Trained Men: A Placebo-Controlled, Double-Blind, Parallel-Group Comparison Study: Original Research”. Journal of Exercise and Nutrition 9, no. 1 (January 7, 2026). Accessed January 30, 2026. https://www.journalofexerciseandnutrition.com/index.php/JEN/article/view/214.