Whey protein peptides are peptide substances with multiple biological functions, derived from whey protein extracted from milk through composite enzymatic hydrolysis and specific small molecule separation techniques. Their nutritional value is superior to that of the original large-molecule whey protein, making them suitable for the development of upgraded whey protein products in the market. Due to their diverse biological effects, whey protein peptides can be widely used in product development across fields such as sports nutrition, special dietary foods, protein-fortified foods, and health and wellness products.