The World’s #1 Whey Protein Powder. Whey protein is a high-quality, fast-digesting protein powder derived from milk, designed to support muscle growth, maintenance, and recovery. Each serving delivers up to 23–30g of complete protein, containing all essential amino acids and branched-chain amino acids (BCAAs) to help fuel lean muscle development and repair after exercise. This ready-to-mix powder is low in fat and sugar, making it suitable for a wide range of dietary needs, including athletes and fitness enthusiasts. Whey protein is also vegetarian-friendly and gluten-free, with no artificial flavors, colors, or additives for a clean, natural supplement. It mixes easily with water or milk for a smooth, great-tasting shake.