Protein is the most complex form of nutrition in the metabolic process. Unlike carbohydrates or fats, protein requires fat-burning energy to be synthesized into usable energy, which makes it a great tool for weight loss! Whey is an excellent source of good protein and helps builds up glutathione, a naturally occurring antioxidant that strengthens the immune system. However, not all whey is created equally. Satisfy your appetite and enjoy a nutritious meal by drinking a Yoli Essential Shake. YESTM features Yoli's exclusive PuraWheyTM premiumgrade whey protein and LeanImmuneTM, a potent blend of fruits and vegetables. YES is a natural whey protein shake that is sweetened with stevia and contains no artificial preservatives, colors, or flavors. With high protein, high fiber, and just 90 calories per serving, YES is your ideal meal-replacement solution.