The CORE protein shake is a low calorie, high quality protein source used as a healthy snack in between meals or combined with healthy fats and veggies for a complete meal. RVL is a meal replacement shake containing a potent antioxidant blend found in MonaVie Juices. The CORE shakes do not contain the antioxidant blend, leading to lower costs for you the consumer. Both shakes contain high quality ingredients, but have different end goals. The CORE protein shake is the base product for the entire CORE system. Boosts have been created to work synergistically with the shake for improved health, healthy weight management, and increased performance.