Milk Protein\Lactis Proteinum\Protéine Du Lait

Milk protein is a collective term for bovine milk-derived proteins used in cosmetics as conditioning, film-forming, and moisture-binding ingredients. In skincare it is mainly added to improve softness, reduce the feel of tightness, and support a smoother skin surface. As a protein mixture, it is not a single molecular species, so molecular weight varies by composition.