Combining biotin, lemon extract, and glycolic acid, this serum deeply cleanses your scalp and hair follicles, removing excess build-up, oils, and pollutants to transform your hair, stimulating growth and strengthening hair follicles to leave it healthy and full of texture. Benefits of Avant Skincare Expert Biotin Restoring and Restructuring Hair Mask-in-Serum 100ml: Thickens hair and stimulates growth. Deeply cleanses your scalp and hair follicles. Moisturises and exfoliates to leave hair healthy. How to use: Apply 3-4 pumps into the palms of your hands after shampooing and conditioning, then spread it evenly through the lengths of your hair. Do not rinse. Size: 100ml