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Pal-GHK (Palmitoyl Tripeptide-1) Pal-GHK, also known as palmitoyl tripeptide-1, is a synthetic cosmetic peptide made by attaching a palmitic acid chain to the human tripeptide GHK (glycyl-L-histidyl-L-lysine). The fatty acid tail makes the peptide more lipophilic so it can better penetrate the skin, where GHK-based signals are known to stimulate collagen and support extracellular matrix repair. It is used as a signaling ingredient in anti-aging skincare rather than as a medicine.
- Signals collagen production
- Improves firmness and texture
- Gentle and non-irritating
- Good penetration from the palmitoyl tail
- Occasional mild irritation or redness at the application site
- Rare allergic sensitivity to peptide ingredients
Overview
Pal-GHK (palmitoyl tripeptide-1) is a lipidated derivative of GHK, a naturally occurring tripeptide with the sequence glycyl-L-histidyl-L-lysine that circulates in human plasma and binds copper to form the complex GHK-Cu [1]. GHK and GHK-Cu were first characterized as factors that influence tissue repair and remodeling, and they have been shown to stimulate the synthesis of collagen and other components of the extracellular matrix [1][2]. In Pal-GHK, a palmitic acid group is chemically joined to the tripeptide, which raises its affinity for the lipid-rich outer skin and improves its ability to cross the skin barrier when applied topically.
Pal-GHK is used mainly as a cosmetic signal peptide in anti-aging and skin-conditioning products, where it is meant to prompt fibroblasts to rebuild the skin's supportive matrix. In laboratory work, the parent GHK-Cu complex increased collagen production and connective-tissue accumulation in wound models and improved measures of skin firmness, elasticity, and fine lines in controlled studies of aged skin [1][2]. Clinical evaluations of finished cosmetic formulations that contain palmitoyl tripeptide-1 alongside other actives have reported gains in skin hydration, elasticity, and collagen density with topical use over several weeks [3].
Pal-GHK is classed as a cosmetic ingredient rather than a drug, and it appears in serums, creams, and eye treatments, usually combined with other peptides and actives [3]. Because it is used at low concentrations in topical products, it is generally regarded as well tolerated, and its role is framed around skin appearance rather than the treatment of disease. As with many cosmetic peptides, much of the mechanistic evidence comes from work on the parent GHK molecule, and effects reported for multi-ingredient formulas cannot be attributed to the peptide alone [1][3].
Mechanism
The activity of Pal-GHK is attributed to the GHK portion of the molecule, which acts as a matrikine, a signaling that instructs skin cells to carry out repair and remodeling [1]. GHK, especially as its copper complex GHK-Cu, has been shown to stimulate fibroblasts to produce collagen, elastin, and glycosaminoglycans, to modulate the balance of matrix-building and matrix-degrading enzymes, and to support wound healing and blood-vessel formation [1][2]. The palmitoyl chain added in Pal-GHK does not itself carry the biological signal; instead it increases the 's lipophilicity so that more of the active tripeptide can cross the skin barrier and reach fibroblasts in the dermis. Once delivered, the peptide is thought to promote extracellular-matrix synthesis that can improve the firmness and appearance of aging skin [2][3].
receptor fingerprint
Dermal collagen synthesisstimulates
Fibroblast matrix signalingactivates
Skin barrier penetrationenhances
Glycosaminoglycan productionincreases
Dosingtypical ranges, not medical advice
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Safetyrisks and cautions, not medical advice
Topically it is considered very safe and non-irritating, which is part of its appeal versus harsher actives. Allergic reactions are rare but possible. There is no reason to ingest it, and its benefits are only established for topical cosmetic use.
Subjective profileweighing the evidence above
A well-established, gentle anti-aging skincare peptide; good supporting cast for collagen, but not a headliner on its own.
Resources
This entry is here for reference.
Research
- 1993first citedIn vivo stimulation of connective tissue accumulation by the tripeptide-copper complex glycyl-L…
- 2024most recentComprehensive evaluation of the efficacy and safety of a new multi-component anti-aging topical…
- 1.The human tri-peptide GHK and tissue remodeling
- 2.In vivo stimulation of connective tissue accumulation by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ in rat experimental wounds
- 3.Comprehensive evaluation of the efficacy and safety of a new multi-component anti-aging topical eye cream
3 listed here; entry last updated August 2026
Reviews
My notesprivate to this device
FAQ
How is it different from GHK-Cu?
Pal-GHK has a palmitic acid tail for penetration and lacks the bound copper of GHK-Cu, though it shares the same peptide core.
How long until I see results?
Topical peptides are gradual; expect a couple of months of consistent use for visible change.
Can I use it with retinol?
Yes, they are complementary; the peptide is gentle and can help offset retinoid dryness.
Is it worth ingesting?
No; its benefits are established only for topical use on skin.
Limitations of the evidence
- Cosmetic ingredient with limited long-term safety data on its own
Adverse effects
- Occasional mild irritation or redness at the application site
- Rare allergic sensitivity to peptide ingredients
Notes and cautions
- Generally well tolerated in topical use