Energy and Endurance Optimizes Recovery GMP Quality Assured A Dietary Supplement NOW Sports Amino Power Pre-Workout Powder features BCAAs, Beta-Alanine, L-Arginine, and more to help you stay focused and energized so you can train harder and longer. Amino Power has BCAAs to support muscle growth, retention, and recovery, and Beta-Alanine to delay muscle fatigue and promote rapid recovery from intense exercise. L-Arginine is included to enhance blood flow and nutrient delivery. With 50 mg Caffeine per scoop, this great-tasting supplement helps you maintain physical energy and focus during your workout, while supporting your body's natural recovery process.