Superpower peptides available for pre-order. Get first access.
Cosmetic and topical
Skin & aging
Palmitoyl hexapeptide-12
Palmitoyl hexapeptide-12 is an elastin-fragment peptide used in skincare. Learn how it works, what research exists, and why it is a cosmetic ingredient.
- Reviewed by
- William Maish, MD MBA MPH, Clinical Product Lead
- Published
- October 5, 2026
- Last updated
- October 5, 2026
Key takeaway
Palmitoyl hexapeptide-12 is a fat-attached "signal" peptide based on a fragment of elastin, the protein that gives skin its stretch, sold as Biopeptide CL. Laboratory work suggests it signals skin cells to make more structural proteins and can help reinforce the skin barrier, which is the basis for its use in products aimed at the appearance of firm, supple skin. As of 2026, the human data are limited to mechanistic and safety studies, with no independent trial showing an appearance benefit.
What is palmitoyl hexapeptide-12?
Palmitoyl hexapeptide-12 is a peptide of six amino acids joined to palmitic acid to help it penetrate the skin. Its peptide core is a fragment sequence derived from elastin, the protein that lets skin stretch and recoil, which places it among the signal peptides that aim to influence the skin's support structure. It is made by Sederma (Croda Beauty Actives) under the name Biopeptide EL and is a cosmetic ingredient, not a drug. On some labels it can be cross-listed with "palmitoyl oligopeptide," so naming is occasionally ambiguous.
How does it work?
Laboratory studies describe palmitoyl hexapeptide-12 as an elastin-derived matrikine, a fragment that signals skin cells. In cell models it is reported to prompt fibroblasts to make more elastin, glycosaminoglycans, and collagen, and to lower an inflammatory messenger, interleukin-6. More recent laboratory work on human skin samples also shows the peptide can self-assemble, penetrate the outer layers, and help reinforce a weakened skin barrier1.
One nuance belongs in an honest description: Elastin-derived fragments have a mixed biology, and at some levels they can actually promote inflammation, so a benefit should not be assumed from the mechanism alone. In finished cosmetics, the goal is described in appearance terms for the look of firmer, smoother, more resilient skin.
Is it FDA-approved?
No, and it does not need to be. The FDA does not pre-approve cosmetic ingredients. A cosmetic may describe effects on the look and feel of skin, while a claim to rebuild the body's elastin would make a product a drug. Palmitoyl hexapeptide-12 is used as a cosmetic ingredient, for the appearance of the skin.
What is it used for?
Palmitoyl hexapeptide-12 is used in "anti-aging" and barrier-support serums and moisturizers. The appearance goals are the look of firmness and elasticity, smoother texture, and a reduction in the appearance of fine lines.
What does the research show?
The human evidence is limited to mechanism and safety rather than appearance outcomes. According to PubMed, two studies address it:
| Study | Evidence type | Finding |
| Ex-vivo human skin study1 | Mechanism | The peptide penetrates skin and can help repair a stripped barrier |
| Cosmetic-peptide safety analysis2 | Safety | No toxicity or allergy flags for it |
Neither is an efficacy trial. No independent human study measuring wrinkle or firmness outcomes was found, so efficacy claims rest on manufacturer and laboratory data.
What are the side effects?
Palmitoyl hexapeptide-12 is considered low-irritation and safe at cosmetic use levels, and bioinformatic screening found no allergen or toxin flags. Independent clinical safety data are limited, so a patch test is reasonable for sensitive skin.
Sources: an ex-vivo human skin study of penetration and barrier repair (Ligorio et al., ACS Applied Bio Materials, 2025, DOI: 10.1021/acsabm.4c018161); and a cosmetic-peptide safety analysis (Bjerke et al., Current Research in Toxicology, 2026, DOI: 10.1016/j.crtox.2026.1002912), both indexed on PubMed. This document is educational and does not constitute medical advice.