Ingredient · Signal (Matrikine) Peptide
Palmitoyl Pentapeptide-4
INCI · Palmitoyl Pentapeptide-4
Related names and forms: Pal-KTTKS. This list does not indicate synonyms or exact ingredient matches.
Palmitoyl pentapeptide-4 (INCI: Palmitoyl Pentapeptide-4; Pal-KTTKS) is one of the most studied matrikine signal peptides in cosmetic literature, usually known by the trade name "Matrixyl". Its structure combines a palmitoyl fatty acid tail with a small peptide resembling a protein fragment involved in collagen production (the KTTKS sequence). The underlying matrikine idea is to offer a fragment that mimics the skin's own renewal signals. Two things need separating: "Matrixyl" is a trade name and complex, while "Palmitoyl Pentapeptide-4" is the INCI name. Reading by INCI reveals the ingredient, not the brand name. Although the cosmetic literature on palmitoyl pentapeptide-4 is relatively broad, effect size still needs measured interpretation according to concentration, penetration and formulation. Being one of the most studied peptides does not automatically guarantee results. Labels show "Palmitoyl Pentapeptide-4", and its PubChem record was verified by CAS (CID 9897237, C39H75N7O10; confirmed with CAS 214047-00-4; "Matrixyl" also appears as a trade-name synonym). The main peptide page covers the general class; this page focuses on palmitoyl pentapeptide-4, its structure, the trade-name/INCI distinction and concentration. When assessing a palmitoyl pentapeptide-4 product, Klaris reads consistency between brand messaging and the actual INCI list, concentration and the whole formula together.
i. Cosmetic Functions
Frequently Discussed Effects
The following headings summarise areas of effect frequently discussed in the literature; visible results in each area require regular use and a suitable formula.
A Classic Matrikine
It is among the cosmetic peptides most frequently cited in the context of skin matrix renewal signals.
Low-Concentration Formulation
It is used at very low concentrations and suits lightly textured formulas.
Integrated Use
It appears with other peptides and actives in formulas addressing the appearance of ageing.
Mechanism
What Happens Within the Skin?
The following points summarise mechanisms from dermocosmetic literature in plain English. Klaris presents them as background information to help readers understand the context, not as medical claims.
Step 1
A Classic Matrikine Peptide
It is one of the most frequently cited cosmetic peptides for skin matrix renewal signals, with a sequence resembling a protein fragment involved in collagen production (KTTKS).
Step 2
The Palmitoyl Tail
The water-soluble peptide portion and lipophilic palmitoyl tail support compatibility within the formula.
Step 3
Matrixyl Is a Trade Name
"Matrixyl" is a trade name and complex; "Palmitoyl Pentapeptide-4" is the INCI name identifying the ingredient.
Step 4
Very Low Concentrations
It is used at very low concentrations and suits lightly textured formulas.
Step 5
A Measured Reading of Effects
Being one of the most studied peptides does not automatically guarantee results. Effects need measured interpretation according to concentration, penetration and formulation.
ii. Role in the Formula
How Is It Read on a Label?
Its water-soluble portion and lipophilic palmitoyl tail help palmitoyl pentapeptide-4 fit into formulas. It is generally a foundational ingredient in well-known commercial peptide complexes; reading the INCI list reveals this ingredient. It appears at low concentrations in serums and creams.
A Closer Look · pH, Stability, Synergy
Palmitoyl pentapeptide-4 is one of the most cited matrikines in cosmetic peptide literature, usually called "Matrixyl". Its water-soluble peptide portion and lipophilic palmitoyl tail help it fit various formulation systems at very low concentrations, often ppm levels. For Klaris, the critical reading framework is the trade-name/INCI distinction: "Matrixyl" is a trade and complex name, while "Palmitoyl Pentapeptide-4" is the INCI name seen on a product's ingredient list. INCI is essential for reading the actual ingredient behind the brand narrative. The matrikine idea is to mimic the skin's own renewal signals by supplying a fragment resembling a protein segment involved in collagen production (KTTKS). Although researched, being a signal peptide is not the same as delivering a noticeable topical result. Effect size depends on concentration, penetration and formulation. Claims such as "supercharges collagen" or "firms skin" require restraint in cosmetics, even for one of the most studied peptides. A peptide name alone is not a quality signal. The main peptide page covers the class context; this page focuses on palmitoyl pentapeptide-4, its structure, the trade-name/INCI distinction, concentration and evidence context. When assessing a palmitoyl pentapeptide-4 product, Klaris reads consistency between brand messaging and the actual INCI list, concentration and the whole formula together.
Typical Concentration Range
Very low concentration (on a complex basis, often ppm levels)
Ingredient Family
Renewal Ingredients
iii. Sensitivity Advisory
A Note on Extra Care in Context
Peptides are generally described as having low-irritation profiles; a patch test is a measured approach for sensitive profiles.
A sensitivity advisory is not an instruction for use; where individual health circumstances, pregnancy or known sensitivities are involved, discussing the decision with your doctor may be a more contextual approach.
Common Misconceptions
Frequently Confused Points
Common Belief
Matrixyl (palmitoyl pentapeptide-4) supercharges collagen and eliminates wrinkles.
A More Contextual Reading
The matrikine approach mimics skin signals using a fragment resembling a protein segment involved in collagen production, but being a signal peptide does not guarantee topical results. Effects need measured interpretation according to concentration, penetration and the whole formula.
Common Belief
"Contains Matrixyl" means there is something special in the INCI list.
A More Contextual Reading
"Matrixyl" is a trade name and complex; the INCI name is "Palmitoyl Pentapeptide-4". INCI, not the trade name, is essential for reading the actual ingredient behind the brand story.
Common Belief
It is the most effective because it is the most studied peptide.
A More Contextual Reading
A relatively broad literature is valuable, but "most studied" does not automatically mean "most effective" or "guaranteed results". Effects need measured interpretation according to concentration, formula and regular use.
Common Belief
A natural or gentle peptide gives everyone the same result.
A More Contextual Reading
Peptides are generally described as low-irritation, but results vary with individual skin, concentration and the whole formula. A peptide name alone does not signal a result.
Scientific Basis
Sources and Their Scope
The following headings indicate areas of research; they are not citations of a specific publication or confirmation that every statement on this page has been verified. The links provided should be read with their individual scope in mind.
- International INCI / CosIng Database
- Dermocosmetic Research Publications
Source Links
Database records provide ingredient identity and registration information; on their own, they do not establish the effect of a finished product or its suitability for a profile. Search links are not specific research papers.
v. Renewal Ingredients Family
Other Ingredients in the Same Family
Explore ingredients in the same functional family to deepen your reading of formulas.
vi. Academy · Related Reading
For a Closer Look
vii. Related Concern Guides
Guides That Include This Ingredient
Klaris · Example Analyses
How Does Palmitoyl Pentapeptide-4 Feature
in Your Products?
Explore product examples to see the ingredient list, general assessment and match score that changes with the example profile together.
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