Hydrolysed protein, not a defined sequence
Collagen peptides are produced by hydrolysing collagen from bovine, porcine or marine sources. The process breaks a large structural protein into short fragments, which dissolve readily and are absorbed more easily than intact collagen.
The result is a mixture. It is not one molecule with one sequence; it is a distribution of fragments whose exact composition varies with the source material and the process. That is why a certificate of analysis in the sense used elsewhere on this site does not really apply.
They are sold as a food supplement, taken orally, and regulated as food. Everything else in this catalogue is research material with a defined sequence. The two categories barely touch.
The supplement literature is real and worth reading on its own terms. The hydrolysate trials indexed on PubMed record measures such as skin elasticity and joint scores in people taking the product, with all the variability that source material and process introduce. What they do not measure is any compound in this catalogue, and a product page that borrows their findings is describing something it does not sell.
Four ways they are not comparable
Where the two categories actually diverge.
One word, two markets
Search for peptides and you get both: a supplement aisle and a research catalogue. The shared word does a lot of unearned work, and some suppliers are content to let a visitor arrive expecting one and buy the other.
The specific overlap that causes trouble is skin. The supplement is marketed for skin, and GHK-Cu is researched in dermal contexts. They are entirely different things: one is a hydrolysed protein mixture taken orally, the other is a defined tripeptide complexed with copper.
We do not sell collagen peptides. This page exists so that anyone who arrived looking for them knows within a few seconds that they are in the wrong catalogue.
The distinction is easy to check for yourself. The GHK-Cu record on PubChem gives a single structure with a single mass, which is what a certificate can be measured against; a hydrolysate has neither. The certificate page explains what identity and purity mean for a defined sequence, and the research areas index is the map of what this catalogue does cover, for anyone who arrived expecting a supplement aisle.
- A skin supplementYou want a food supplement retailer. We supply research material and cannot help with that.
- Joint support you can take dailySame answer. Nothing here is intended or approved for consumption.
- GHK-Cu because it mentions collagenA different compound entirely: a copper-bound tripeptide studied in dermal models.
- Something you saw called a collagen peptide penThat is not a product category we recognise. Ask what compound the certificate names.
What we do supply
Three pages covering the compounds people actually mean when they land here.
About collagen peptides
What visitors who land here usually want to know.