Scruples hair products use the blend, Protective Barrier Complex, which include the ingredients: Mucopolysaccharides, Hydrolyzed Cationic Proteins, UV Absorbers, and SiliconeConditioners. Products such as Pearl Prescriptives, O2, Barrier s and more use this. They protect your hair and condition it so that you can face the elements again. They replace protein and balance moisture in your hair and scalp to help make hair stornger. Their products contain no animal ingredients and are never tested on animals of any kind.