Whey protein and whey protein peptides are widely used in nutritional and functional food products due to their high biological value and rich amino acid profile, especially branched-chain amino acids like leucine. They are commonly added to sports and performance supplements to support muscle growth, recovery, and maintenance, particularly after exercise.

These proteins are also used in medical and clinical nutrition formulations for individuals recovering from surgery, the elderly, or those with protein deficiencies, helping to prevent muscle loss and support immune function. Due to their solubility and emulsifying properties, they are incorporated into beverages, infant formulas, and meal replacement products.

Whey protein peptides, which are pre-digested forms, are used in specialized supplements for faster absorption and may support metabolic health, blood pressure regulation, and satiety. They are also found in weight management products and functional foods aimed at improving overall wellness.

Additionally, whey proteins are utilized in the cosmetics industry, such as in creams and masks, due to their moisturizing and antioxidant properties, which help make the skin stronger and more youthful.