Free from sulfate surfactants & silicones It´s a nourishing cleanser with violet sweet potato extracts Low sensitising purple pigments neutralise unwanted yellow tones and enhance the hair's natural highlights for a refreshed, radiant glow. Sweet Potato Extract is often used as soothing and conditioning agents. Purple sweet potatoes are high in anthocyanins, which are antioxidants known to reduce inflammation. Its extract is violet and often used as natural food colourant.