"It is a specific conditioning serum for devitalized and weak hair. It is formulated with Biotin (Vitamin B7), which is involved in cellular metabolic reactions from which cells obtain energy, and with keratin that repairs and conditions. It is the perfect complement to treatment with Biotin Shampoo to achieve hair revitalization. Conditions and facilitates combing, restructuring the hair fiber with keratin and providing the hair with the strength of Biotin. Provides hair with exceptional shine thanks to its high conditioning power." "" "Before use, shake and apply preferably to clean, damp hair. Spray the contents evenly on the hair and scalp, massaging gently. Do not rinse after application."