The Ordinary Multi-Peptide Serum for Hair Density 60mlThe Ordinary Multi Peptide Serum for Hair Density 60ml Clinical Peptide Formula for Thicker Hair The Ordinary's Multi Peptide Serum for Hair Density (60ml) is a concentrated, leave on scalp serum that targets hair thinning at the follicle level. Consistent with The Ordinary's clinical, ingredient focused philosophy, the formula combines Redensyl, Procapil, Baicapil, and CAPIXYL four evidence backed actives known for their roles in supporting hair