The L'Oréal Group is the worl's largest cosmetics and beauty company and is headquartered in the Paris suburb of Clichy, France. L'Oréal has developed activities in the field of cosmetics, concentrating on hair color, skin care, sun protection, make-up, perfumes and hair care. L'Oréal is active in the dermatological and pharmaceutical fields. L'Oréal is also the top nanotechnology patent-holder in the United States.