GNC TOTAL LEAN LEAN BAR – WHITE CHOCOLATE CRUNCH: HIGH-PROTEIN MEAL BAR. Lean Bar is a hunger-satisfying, high-protein meal bar that can help you get essential nutrients while you’re on-the-go. If you need to satisfy your cravings while staying on track with your weight loss journey, Lean Bars are available in a variety of flavors to help satisfy your cravings. Protein can help with appetite control because it promotes the feeling of fullness and reduces the feeling of hunger. Protein plus exercise helps your body composition. Enjoy 15g of protein per serving. Gluten free. Flavor: White Chocolate Crunch.