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Category

Skin & Hair

Matrix remodeling and pigmentation research peptides.

This category groups peptides studied in dermal matrix biology, keratinocyte and fibroblast models, and pigmentation pathways. The two dominant mechanisms are copper-dependent matrix signalling and melanocortin receptor activity.

Material is supplied for laboratory research only. These are not cosmetics, not topical products and not approved for human use in any form.

Skin & Hair research compounds

Copper peptide chemistry

GHK-Cu is the copper(II) complex of glycyl-histidyl-lysine and is among the most studied peptides in dermal matrix research, associated in in vitro work with collagen and glycosaminoglycan expression and metalloproteinase regulation. The copper is integral to the species, not an additive.

This matters practically. Buffers containing EDTA or other chelators will strip the copper and leave the free tripeptide, which is a different molecule with different behaviour. Where a chelator is unavoidable in downstream steps, the copper species should be verified analytically rather than assumed.

Pigmentation-pathway compounds

Melanotan II acts across melanocortin receptor subtypes including MC1R, the receptor central to melanogenesis research. It is a cyclic lactam and is photosensitive in solution, so amber or foil-protected storage is standard.

Assay design notes

Dermal-model work commonly uses primary fibroblast or keratinocyte culture, where serum components in the medium can bind copper and confound copper-peptide studies. Serum-reduced conditions with an explicit copper control are the usual way around this.

Skin & Hair — frequently asked questions

Why must GHK-Cu avoid chelating buffers?

The copper ion is part of the active complex. Chelators such as EDTA strip it, leaving the free GHK tripeptide — a chemically different species that will not behave as the copper complex in matrix-biology models.

Is GHK-Cu supplied as a topical product?

No. It is supplied as a lyophilized research chemical in a sealed vial for laboratory use. It is not a cosmetic, not formulated for application to skin, and not approved for human use.

How should photosensitive peptides be stored in solution?

In amber vials or foil-wrapped clear vials, refrigerated at 2–8 °C, and used within a short working window. Direct light exposure accelerates degradation in photosensitive sequences such as melanotan II.

What purity should dermal research material meet?

PrimeGen releases this category against RP-HPLC purity and independent mass-spectrometry identity confirmation, with both figures published on the lot certificate. Match the purity requirement to the sensitivity of your assay.

Related research categories

All compounds listed on this page are supplied for laboratory research use only. They are not drugs, supplements or cosmetics, and are not intended for human or veterinary consumption. See our research use policy.

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Related categories, stacks and documentation

Compare skin & hair against adjacent research categories, or read the analytical and policy documentation that applies to every lot.