Banana and peanut butter protein shake is a healthy meal rich in protein and healthy complex carbohydrates that provide the body with energy, vitamins and minerals needed after exercise. It uses Laperva Iso Triple Zero protein, which is rich in protein and free of lactose, sugar, fat and cholesterol. Bananas are known to provide the body with sugars and minerals needed to support muscle health such as potassium and magnesium. The body also gets healthy fats from peanut butter.