K18 Damage Shield pH Protective Shampoo 250mlK18 Damage Shield pH Protective Shampoo is a colour safe, pH optimised shampoo with the patented K18PEPTIDE to effectively cleanse while maintaining hair health and protecting hair from damage. The pH optimised formula helps reduce excess swelling of the hair cuticle during washing to help prevent frizz, preserve colour, and enhance shine. Scalp microbiome friendly and gentle enough to use every time you cleanse.