Pal-GHK (also referred to as Palmitoyl Tripeptide-1 or palmitoyl oligopeptide) is a synthetic lipopeptide consisting of the tripeptide sequence Gly-His-Lys (GHK) conjugated to a palmitoyl fatty acid. In laboratory research, Pal-GHK is used as a tool compound to investigate peptide–lipid conjugation effects on cellular uptake, fibroblast-associated signaling, and extracellular matrix (ECM) regulation in preclinical experimental systems.

Sequence (Three-Letter Code): Palmitoyl-Gly-His-Lys
Molecular formula:C30H54N6O5
Molecular weight: 578.8 g/mol

Pal-GHK is a peptide–lipid conjugate in which a palmitoyl chain increases hydrophobic character relative to the parent tripeptide. This modification is commonly used in preclinical research to evaluate how lipidation alters peptide partitioning into membranes, transport across biological barriers in model systems, and intracellular availability in cultured cells.

• Fibroblast / ECM studies: Investigation of fibroblast-associated ECM gene programs, including collagen- and elastin-related expression in cell culture and animal models.
• Peptide lipidation research: Comparative studies of peptide vs. lipopeptide behavior to evaluate the impact of palmitoylation on membrane affinity and cellular uptake.
• Signal transduction mapping: Profiling of peptide-driven changes in growth-factor and cytokine signaling networks relevant to connective tissue biology under controlled experimental conditions.
• Combination-design experiments: Use in multi-peptide research designs to assess additive or interaction effects on mechanistic readouts in vitro or in vivo models [1].

Fibroblasts are primary producers of extracellular matrix components and are frequently used in preclinical models to study connective-tissue homeostasis, ECM turnover, and matrix-associated signaling. Short peptide motifs derived from matrix proteins (or matrix-associated fragments) are commonly evaluated as mechanistic probes for fibroblast activation states and downstream transcriptional responses.

The GHK tripeptide motif has been studied in vitro and in vivo for its capacity to influence fibroblast behavior and redox-associated gene expression in preclinical systems [2]. Lipidation with palmitoyl is used experimentally to modulate physicochemical properties (e.g., hydrophobicity and membrane interaction), enabling structure–activity work on peptide delivery and intracellular engagement in model systems.

Preclinical literature describing palmitoylated tripeptides and related GHK-based systems has evaluated changes in ECM-associated readouts, including collagen- and elastin-linked expression patterns, using experimental skin-relevant models and cell culture platforms [2]. In these contexts, Pal-GHK is frequently discussed as part of broader ingredient systems and multi-component research formulations [1].

Published work on over-the-counter topical agent evaluation and erythema/photoaging management includes clinical framing; however, within an RUO context, these reports may be used strictly as background references for mechanistic hypotheses, assay design, and selection of laboratory endpoints (e.g., ECM markers, inflammatory mediators, oxidative-stress gene panels) rather than as evidence of outcomes in any intended-use setting [3–5].

Pal-GHK (Palmitoyl Tripeptide-1) is supplied as a purified research reagent intended for laboratory experimentation. Product identity and purity are typically confirmed using analytical techniques such as high-performance liquid chromatography (HPLC) and mass spectrometry (MS). Standard peptide handling and storage practices should be followed in research environments.

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The products offered on this website are furnished for in-vitro studies only. In-vitro studies (Latin: in glass) are performed outside of the body. These products are not medicines or drugs and have not been approved by the FDA to prevent, treat or cure any medical condition, ailment or disease. Bodily introduction of any kind into humans or animals is strictly forbidden by law.

For Laboratory Research Only. Not for human use, medical use, diagnostic use, or veterinary use.