The Ordinary Multi-Peptide Serum for Hair DensityApplication: Apply a few drops or as needed once daily, ideally at bedtime, to clean, dry scalp. Massage into scalp thoroughly. This formula is a leave on/in treatment. Do not wash hair or scalp after application. If irritation occurs, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised. Keep out of reach of children 60ml For hygiene reasons, this product cannot be exchanged or refunded, unless faulty.