Hair and scalp care is a fast-growing peptide category. Here are the peptides buyers ask for most, with CAS numbers.
Core hair-care peptides
- Biotinoyl Tripeptide-1 (CAS 299157-54-3) — a biotin-conjugated peptide widely used in tonics, serums and ampoules positioned around stronger-looking hair.
- Copper Tripeptide-1 (GHK-Cu, CAS 89030-95-5) — the blue copper peptide, also used in scalp and hair formulas for renewal claims.
Formulation notes
Most hair peptides are water-soluble and go into the water phase during cool-down at a mild pH. For rinse-off systems, confirm compatibility with surfactants; for leave-on serums and ampoules, keep the base simple and validate stability. As always, run preservative-efficacy testing and store the raw materials sealed, cool, dry and away from light.
Building a scalp/hair serum
A common approach is a lightweight aqueous serum with one or two peptides plus supporting humectants and soothing agents. Keep the peptide levels within typical ranges, and confirm claims comply with your market's regulations (cosmetic vs drug positioning differs by region).
WYOO supplies Biotinoyl Tripeptide-1 and Copper Tripeptide-1 (plus a broad cosmetic peptide range), cosmetic grade, with COA and MSDS on every batch and MOQ from 1 kg. Request samples to develop your hair-care line.