Palmitoyl hexapeptide-12
Signal peptide
Also Biopeptide EL, Pal-VGVAPG, Palmitoyl oligopeptide (former name), Palmitoyl hexapeptide 12, Pal-hexapeptide-12
- Evidence
- CAnimal and cell studies
- FDA status
- Cosmetic ingredientas of 2026-10-26
- Route
- Topical
- Studies cited
- 0 human1 animal or cell
A skin-care ingredient sold to firm skin and smooth wrinkles. It has been tested on skin samples in a lab, not in people.
Sold for
Palmitoyl hexapeptide-12 is sold in anti-aging serums as a collagen-signaling peptide that firms skin and smooths wrinkles.
Studies say
The published evidence shows the peptide penetrates skin and interacts with its structural molecules in the laboratory; whether that changes how skin looks has not been tested in a published human trial.
Why grade C. The identifiable published work is a 2025 ex vivo study on excised human skin that tracked where the peptide goes and how it interacts with skin components, plus a 2018 industry safety review. No controlled trial in living people measuring wrinkles, firmness or hydration has been identified. That is laboratory evidence only. 12
FDA. Palmitoyl hexapeptide-12 is a cosmetic ingredient and is not approved by the FDA as a drug for any use. Cosmetic ingredients are regulated but not pre-approved. 3
Written from 3 cited sources. Fact-checked 2026-10-27: 10 claims checked, 0 corrected. Last refreshed 2026-10-27. Not physician reviewed.
What this means for you
- What people take it for
- Firmer skin and fewer wrinkles
- Can a US doctor prescribe it?
- No prescription; it is a cosmetic ingredient.
- Properly tested in people?
- Not properly: lab tests on skin samples, with no published human trial.
Evidence checklist
- Randomised controlled trial No trial in living peopleno
- Human study over 100 people No human sample reportedno
- More than one research group One ex vivo study, one industry reviewno
- Clinical outcomes, not surrogate markers No clinical measuresno
- Human safety data beyond case reports CIR panel review: safe at current useyes
Drawn from the cited studies below. A dash means the sources give no information.
What it is
Palmitoyl hexapeptide-12 is a fragment of elastin with six amino acids. It is attached to palmitic acid, a fatty acid tail. The tail helps the peptide cross the oily outer layer of skin. Suppliers sell it under trade names such as Biopeptide EL. They present it as a signal peptide that tells fibroblasts to make more matrix proteins. 12
It appears in serums and creams, often alongside other palmitoyl peptides. In the United States, those products are cosmetics. That means no approval is needed before sale. The manufacturer, not the FDA, must back up its claims. 3
How it works
The proposed mechanism is matrikine signaling. Small fragments of broken-down matrix proteins such as elastin act as messengers. They tell skin cells to rebuild. A 2025 study in ACS Applied Bio Materials used label-free imaging on excised human skin. It followed the peptide through the skin layers. The peptide co-assembled with native skin molecules. Early effects on skin mechanics and hydration were measured in the lab. The authors called the work a methodological benchmark. It is not proof of a cosmetic benefit. 1
What human research shows
No published controlled trial of palmitoyl hexapeptide-12 in living human skin has been identified in these sources. Such a trial would measure wrinkles, firmness or hydration. The human tissue data come from excised skin samples. Claims of visible results rest on manufacturer testing. That testing has not been published in a peer-reviewed journal. 1
| Study | Model | Finding |
|---|---|---|
| Ligorio 2025 skin penetration study | Excised human skin, ex vivo, label-free imaging | Palmitoyl hexapeptide-12 penetrated skin layers and co-assembled with native skin molecules, with laboratory-measured effects on mechanics and hydration. 1 |
| CIR safety assessment 2018 | Expert panel review of toxicology and use data | Hexapeptide-12 and its derivatives judged safe in cosmetics at present use levels. 2 |
Safety
The Cosmetic Ingredient Review panel assessed hexapeptide-12 and its fatty acyl derivatives in 2018. It concluded they are safe at current use concentrations, which are typically very low. No specific adverse effects have been reported. The assessment covers irritation and sensitization at cosmetic concentrations. It says nothing about whether the peptide works. 2
Questions for your clinician
- Is there any trial in people measuring wrinkles for this ingredient?
- Does the product's concentration match what was reviewed as safe?
- Are there topical ingredients with stronger trial evidence?
Questions people ask
Does palmitoyl hexapeptide-12 reduce wrinkles?
No published human trial shows that it does. The lab evidence shows it gets into skin and interacts with matrix molecules. That is a prerequisite, not a result. 1
Is it safe?
An industry safety panel reviewed it in 2018. It found it safe at the low concentrations used in cosmetics. Short peptides rarely cause irritation. Allergic reactions are possible with any topical ingredient, but none specific to this one have been reported. 2
Why is it combined with other peptides?
Formulators pair signal peptides with others that have different proposed mechanisms. Examples are palmitoyl tripeptide-1 or acetyl hexapeptide-8. With combinations, no effect can be traced to a single ingredient. That is one reason the evidence for each one on its own stays thin. 13
Citations
- Ligorio 2025, ACS Appl Bio Mater: noninvasive monitoring of palmitoyl hexapeptide-12 in human skin layers doi.org
- Cosmetic Ingredient Review 2018, Int J Toxicol: safety assessment of tripeptide-1, hexapeptide-12, their metal salts and fatty acyl derivatives, and palmitoyl tetrapeptide-7 pure.psu.edu
- FDA: how cosmetics are not FDA-approved but are FDA-regulated fda.gov