Salon crafted protein blends. Long lasting vibrancy. ProteinFusion with elastin protein and quinoa. For color treated hair. At Nexxus, we know that hair is made of around 90% proteins, which is why we use advanced scientific methods to identify the protein needs of each hair type. We create customized formulas, with proteins, to bring your hair back to life. Color assure conditioner, with our exclusive Proteinfusion blend with elastin protein and quinoa, protects essential proteins within hair fiber while enhancing its vibrancy.