Oxidizing agent for blonde hair that shines with health.| When you bleach your hair, don't compromise. The L'Oréal Professionnel Blond Studio Nutri-Developer activating emulsion will take perfect care of your hair during the lightening process. Together with una powder or una suitable cream, it creates a una mixture that gives your strands a beautiful and natural-looking color while ensuring a una rich dose of nourishment and hydration.