Biotonic Hair Mask combines the best arguments of oleotherapy and aromatherapy for the benefit of the hair and scalp. Biotonic Hair Mask is a powerful scalp stimulant and hair regenerator. Biotonic Hair Mask is a powerful scalp stimulant and hair regenerator. The organic jojoba oil base is ideal for regulating the production of sebum, whether excess or deficiency. The mask is therefore suitable for all hair types. Organic avocado oil, organic castor oil and our synergy of organic essential oils slow down hair loss and stimulate hair growth. Organic coconut oil restructures and smoothes the hair.