research Abstracts: Reduction‐induced surface modification of human hair September 2010 in “International Journal of Cosmetic Science” Chemical treatments change hair surface properties, making it more hydrophilic and able to bind conditioners.
research Cuticular damage to African–American hair during relaxer treatments – A microfluorometric and SEM Study 3 citations , May 2009 in “International Journal of Cosmetic Science” Relaxer treatments damage African–American hair, with commercial products causing more harm than lab-made solutions.