GNC Total Lean Lean Shake 25 - Mixed Berry: Packed With Protein, Fiber & Other Essential Nutrients When hunger strikes, you can still satisfy it without comprising your weight loss goals. Lean Shake 25 is a delicious meal replacement packed with protein, fiber and other essential nutrients to help you on your journey. Lean Shakes come in a range of flavor options so you can stay on top of your goals and be totally you. Satisfies hunger and supports a healthy metabolism