The L'Oréal Group is a French cosmetics and beauty company, headquartered in Clichy, Hauts-de-Seine, France. It is the world's largest cosmetics company. They have developed activities in the field of cosmetics, concentrating on hair colour, skin care, sun protection, make-up, perfumes and hair care. The company is active in the dermatological, tissue engineering and pharmaceutical fields and is the top nanotechnology patent-holder in the United States.