Keratin Complex by Coppola Keratin Color Care Shampoo is Sodium Chloride Free and Sulfate Free, was developed to extend the vibrancy of Color-Treated Hair. This Sulfate Free Formula contains mild surfactants that gentely remove dirt and buildup without stripping hair of its color. Formulated with Keratin, Soy and Wheat Proteins for lasting protection.. The Keratin Complex formula offers the same silky result with its high percentage of keratin which is infused into the cuticle. Its all about the natural keratin, says Coppola. We are able to achieve these results without the formaldehyde in the Brazilian product.