The Ordinary Multi‑Peptide Serum for Hair Density is a lightweight, leave‑in hair and scalp serum formulated to support the appearance of thicker, healthier‑looking hair. Powered with a blend of multiple peptides, caffeine, and nourishing plant extracts, this serum helps promote fuller‑looking hair while improving scalp condition. With regular use, it can help strengthen hair from the roots, enhance hair resilience, and support overall hair density and vitality.