L’Oréal Professionnel is one of the most popular cosmetic brands designed to protect and restore hair. The brand produces professional hair cosmetics, hair care products, coloring, and styling products for home use and salon services. The history of the L’Oréal brand began in the 1900s with the invention of hair dye, which was a remarkable achievement of its time – it was the first dye that allowed hair to be colored in a variety of shades.