The Ordinary Multi-Peptide Serum for Hair Density is a concentrated formula designed to promote thicker, denser, fuller and healthier-looking hair. The serum features a 21.15% concentration of active technologies including multiple peptide complexes and natural extracts in an ultra-lightweight, emollient base. Key features: • Contains multiple peptide complexes including REDENSYL™, PROCAPIL™, and CAPIXYL™ • Features 1% high-solubility caffeine • Ultra-lightweight, emollient base for efficient penetration • Suitable for all hair types • Free from alcohol and silicone • Vegan and cruelty-free formula The serum should be applied to clean, dry scalp once daily, preferably at bedtime. Massage thoroughly into the scalp and leave in - do not wash after application. The formula comes in UV-protective packaging and has a pH of 4.75-5.75. For best results, consistent daily use is recommended. Results may vary but improvements can typically be seen with regular use over time.