EAS Betagen® + Revigor® Post-Workout Muscle Defense! 35 Calories per serving. Unique combination of creatine and Revigor®. Helps improve muscle strength and body composition*. Supported Goal: Post-Workout Lean Muscle Defense. Main Ingredients: Revigor®, creatine monohydrate EAS® BETAGEN® + REVIGOR® is part of a revitalized family of EAS specialty products, manufactured by Abbott Nutrition. Abbott has more than 85 years of innovation in leading-edge nutritional science. We re a.