Therapro W Distinctively Feminine, Biocell Nutrient Leave-In Treatment, a light protectant for fragile hair. Replenishes essential vitamins and other nutrients vital to the health of the hair. Strengthens the hair while creating extra body and shine. Activates the hair and scalp. Encourages micro-circulation. Detangles. Moisturizes dry, brittle hair. Protects against ultraviolet rays.