research The adsorption behavior of cationic surfactant onto human hair fibers 42 citations , January 2009 in “Colloids and Surfaces B: Biointerfaces” A certain surfactant sticks to human hair, making it change from water-repelling to water-attracting, which could help in hair conditioning.
research Coacervate Formation Behavior and Lubrication Properties of a Hair Shampoo Formulated With Amino Acid Surfactants and Cationized Cellulose September 2025 in “Journal of Surfactants and Detergents” Shampoos with sodium lauroyl methylaminopropionate improve hair lubrication and reduce irritation.