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Study · Not a test of the peptide alone · 2026

2 results

A framework for the safety evaluation of peptides in cosmetics.

Bjerke DL, Li J, Gao Y, Hu P, Lintner K, Hakozaki T

Current research in toxicology20 Mar 2026

Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: CC BY-NC-ND. Results still quote short attributed sentences.

Results from this study2

No result from this study comes from a test of the peptide.

Studies that did not test the peptide alone2

In this study, Matrixyl (palmitoyl pentapeptide-4) was a lab tool or a carrier, part of a mix, or the subject of a lab method. These results are not evidence about taking Matrixyl (palmitoyl pentapeptide-4).

  1. 01Computer modelNot a test of Matrixyl (palmitoyl pentapeptide-4) aloneIn silicoMechanism

    In bioinformatic analyses, palmitoyl pentapeptide-4 showed sequence homology with extracellular matrix proteins in skin.

    In plain wordsIn computer analyses, palmitoyl pentapeptide-4 had sequence similarities to proteins in the skin extracellular matrix.

    Outcome
    Not applicableSequence homology with skin extracellular matrix proteins
    Study

    n: not reported in source

    Bioinformatic safety evaluation
    Outcome group
    Receptor activity and mechanism · Pharmacology

    Source sentences

    Summary
    while palmitoyl hexapeptide-12, caffeoyl hexapeptide-9, and palmitoyl pentapeptide-4 demonstrated sequence homology with extracellular matrix proteins in the skin (collagen, elastin, fibronectin) without the safety concerns of the other peptides.
    1 context sentence
    Summary · context
    To test the framework, a variety of peptides (palmitoyl hexapeptide-12, caffeoyl hexapeptide-9, palmitoyl pentapeptide-4, amanitin alpha, conotoxin ArlB, bradykinin, and enkephaline) are evaluated with NCBI BLASTp, ToxinPred3.0, Peptipedia, BIOPEP-UWM, AllerCatPro 2.0, and IEDB bioinformatic tools.

    In this study, Matrixyl (palmitoyl pentapeptide-4) was a lab tool or a carrier, part of a mix, or the subject of a lab method. This result is not evidence about taking Matrixyl (palmitoyl pentapeptide-4).

  2. 02Computer modelNot a test of Matrixyl (palmitoyl pentapeptide-4) aloneIn silicoSafety outcome

    In bioinformatic analyses, palmitoyl pentapeptide-4 lacked the safety concerns identified for the other peptides.

    In plain wordsIn computer analyses, palmitoyl pentapeptide-4 did not show the safety concerns found for the other peptides.

    Outcome
    Not applicablePredicted safety concerns
    Study

    n: not reported in source

    Bioinformatic safety evaluation
    Outcome group
    Adverse events · Pharmacology

    Source sentences

    Summary
    while palmitoyl hexapeptide-12, caffeoyl hexapeptide-9, and palmitoyl pentapeptide-4 demonstrated sequence homology with extracellular matrix proteins in the skin (collagen, elastin, fibronectin) without the safety concerns of the other peptides.
    1 context sentence
    Summary · context
    To test the framework, a variety of peptides (palmitoyl hexapeptide-12, caffeoyl hexapeptide-9, palmitoyl pentapeptide-4, amanitin alpha, conotoxin ArlB, bradykinin, and enkephaline) are evaluated with NCBI BLASTp, ToxinPred3.0, Peptipedia, BIOPEP-UWM, AllerCatPro 2.0, and IEDB bioinformatic tools.

    In this study, Matrixyl (palmitoyl pentapeptide-4) was a lab tool or a carrier, part of a mix, or the subject of a lab method. This result is not evidence about taking Matrixyl (palmitoyl pentapeptide-4).

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Versions 3 to 4Current

    27 Oct 2026, 16:32 UTC

    The same notice was added 2 times, first on 27 Oct 2026, 16:32 UTC. The status did not change between them.

    Study data updated · source update from Europe PMC

  2. Version 2

    22 Oct 2026, 02:26 UTC

    Study results updated

  3. Version 1

    21 Oct 2026, 18:59 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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