Shampoo is a critical step to keeping brilliant hair color—and I always want to keep a good thing going. My sulfate-free and peptide-infused shampoo with Color Shield UV Complex helps reduce the loss of color from the first wash and preserve vibrancy longer. Clinically tested to: prevent color fading boost shine shield hair from UV rays based on a clinical study using a Colorimeter for the Peptide Protect regimen based on a clinical study using a Glossymeter for the Peptide Protect regimen based on a SEM clinical study on 10 hair tresses for the Peptide Protect regimen