Petology's Keratin Fortifying Shampoo is a natural and gentle sulfate-free cleansing formula which combines keratin, amino acids and natural cleansers to strengthen and moisturize your dog's skin and coat. In a convenient gallon size, it is infused with an advanced blend of botanicals and other mild ingredients with a forever clean & fresh scent that eliminates odors for days. Veterinarian approved and groomer recommended! All Petology formulas include: NaturShine: Petology's patent canine sebum substitute keeps the skin pH balanced, forms a protective barrier for healthier skin and provides brilliant shine for beautiful coats. Vitacon: a patented vitamin complex of A, B-12, D, E, Green Tea and Chamomile that provides outstanding benefits to pets' skin. PMC (Plant Moisturizing Complex): a natural, plant-derived compound that provides instant, deep hydration and generates a moisture reservoir that lasts for up to 72 hours.