Palmitoyl pentapeptide-4Cosmetic ingredient
Palmitoyl pentapeptide-4 is a short peptide with an attached fatty chain, commonly associated with the Matrixyl name. It is used in cosmetics intended to improve the appearance of ageing skin.
What is Palmitoyl pentapeptide-4?
Palmitoyl pentapeptide-4 is a cosmetic peptide with an attached fatty chain, associated with the original Matrixyl ingredient. Products use it to target the appearance of lines and ageing skin.
How it works
Its sequence is related to a collagen fragment. Such fragments can act as signals to cells involved in the surrounding skin matrix; the fatty attachment changes behaviour in a formula, without proving delivery to every target layer.
Effects studied
Appearance of lines and skin texture
The retained references include laboratory research and a controlled topical cosmetic study. Visible outcomes depend on the tested formulation, comparator and duration, rather than on collagen signalling alone. 1 2
Evidence: Laboratory research and a controlled cosmetic-study lead.
What does the evidence show?
The archive includes laboratory work and a controlled cosmetic study. The finished formulation and the appearance outcomes are essential to interpreting the claim.
A fragment used as a signal
The peptide sequence is related to a fragment of collagen. In laboratory systems, such fragments can influence cells that make the surrounding skin matrix. Attaching a fatty chain changes how an ingredient behaves in a formula, but does not by itself demonstrate delivery to every relevant layer of living skin.
The clinical question is visible change
Whether lines look softer or skin looks smoother needs to be measured in people; collagen production in a dish cannot answer those questions. The retained topical study offers clinical evidence to examine, with conclusions limited by its comparator, duration and formulation. 1 2
One trade name can conceal several recipes
A cream containing this peptide may also contain moisturisers, silicones, antioxidants or other peptides that affect appearance and comfort. A result for the complete product cannot quantify the contribution of palmitoyl pentapeptide-4 alone, however prominently the label features it.
Where it fits in a routine
This is a cosmetic appearance ingredient, not an established treatment for a skin disease. Expectations should match that role. Persistent irritation is a reason to reconsider a product, and a peptide serum should not be presented as a replacement for protection from ultraviolet exposure or assessment of a changing skin lesion.
Safety & status
Tolerability depends on the whole formula, and irritation remains possible. Cosmetic appearance research does not establish treatment of skin disease or replace ultraviolet protection.
Country and product status
This page describes a cosmetic ingredient and its research context. Permitted claims and product availability in Germany and Switzerland need a local check. An ingredient listing does not establish approval to treat a medical condition.
Frequently asked questions
Is this Matrixyl 3000?
No. Matrixyl 3000 generally denotes a blend of palmitoyl tripeptide-1 and palmitoyl tetrapeptide-7, not palmitoyl pentapeptide-4.
Does it replace lost collagen directly?
No. It is investigated as a signal related to matrix biology, not as collagen physically installed in the skin.
Further reading
Sources
This entry was rewritten from our research archive. References below are reading leads unless a completed check is explicitly noted; a full independent evidence and regulatory review is still pending.
- Palmitoyl pentapeptide-4: paper 10.1111/j.1467-2494.2005.00261.x Research reference · Retained archive reference; not independently checked for this draft.
- Palmitoyl pentapeptide-4: pubmed.ncbi.nlm.nih.gov reference Research reference · Retained archive reference; not independently checked for this draft.
- Palmitoyl pentapeptide-4: www.specialchem.com reference Reference or product information · Retained archive reference; not independently checked for this draft.
- Palmitoyl pentapeptide-4: www.fda.gov reference Reference or product information · Retained archive reference; not independently checked for this draft.
Research provenance
This name was discovered in the Superpower peptide index, archived 26 October 2026. Its ratings and reviewer attribution have not been adopted as our own. The archive informed this original editorial draft; independent source review is still pending.