"Which peptide should I use?" is one of the most common questions in anti-aging formulation. Peptides are not interchangeable — they fall into families with different roles. Here is a practical map with CAS numbers.
Expression-line peptides
- Acetyl Hexapeptide-8 (Argireline, CAS 616204-22-9) — the classic smoothing peptide. - Acetyl Octapeptide-3 (SNAP-8, CAS 868844-74-0) — the longer, "extended" option. Used in anti-wrinkle serums and eye products.
Signal / matrikine peptides
- Palmitoyl Tripeptide-1 (Pal-GHK, CAS 147732-56-7) - Palmitoyl Tetrapeptide-7 (CAS 221227-05-0) — the two together form the "Matrixyl 3000" pairing. - Palmitoyl Pentapeptide-4 (Matrixyl, CAS 214047-00-4) Positioned around firmness and a smoother appearance.
Carrier / repair peptides
- Copper Tripeptide-1 (GHK-Cu, CAS 89030-95-5) — the blue copper peptide for repair and renewal claims.
Brightening
- Nonapeptide-1 (CAS 158563-45-2) — for even-tone/brightening systems.
How to build a stack
Many modern anti-aging products combine two or three peptides across families — for example a matrikine pair plus an expression-line peptide — to support a broader claim. Keep total peptide cost, pH compatibility and stability in mind, and always validate the finished formula.
WYOO supplies all of the peptides above, cosmetic grade, with COA and MSDS on every batch and MOQ from 1 kg. Download our catalogue or request samples to build your anti-aging line.