Bioderma Cosmetics. Sebium Serum Concentré Rénovateur Purifiant. Treatment that avoids the formation of imperfections and eliminates persistent lesions, such as scars or installed pimples and their marks. It corrects and flattens them, allowing the skin to regenerate. Contains the patented fluidactiv, which corrects facial fat to prevent the appearance of new imperfections. Suitable for sensitive skin. For correct and complete application, use nights and mornings for four consecutive weeks.