The Ordinary Multi-Peptide Serum for Hair Density is a concentrated formula designed to promote thicker, denser, fuller and healthier-looking hair. This advanced serum contains multiple peptide complexes and active ingredients in an ultra-lightweight, emollient base for optimal penetration and results. Key features: • Suitable for all hair types • Contains multiple peptide complexes • Ultra-lightweight formula • Promotes hair density and thickness • 60ml/2fl oz size • Comes in UV-protective amber bottle The serum should be applied directly to clean, dry scalp, ideally at bedtime. A few drops should be massaged thoroughly into the scalp and left in as a leave-on treatment. The formula contains a 21.15% concentration of active technologies including REDENSYL™, PROCAPIL™, CAPIXYL™, and BAICAPIL™ complexes along with AnaGain™ and caffeine for maximum efficacy.