# Formula Med Spa: the whole preparation

> Formula Med Spa — GHK-Cu in the full formula — Formula Med Spa follows GHK-Cu from collagen cultures to topical preparations, asking how the carrier and the measured outcome affect the claim.

**Notes on cosmetic formulations**

I trust an ingredient name a little more when it arrives with the preparation attached. With GHK-Cu, the carrier, the skin and the outcome all deserve space on the page.

## GHK-Cu and the formula around it

The word formula sounds satisfyingly complete. An ingredient, a preparation, a result. GHK-Cu makes that neatness difficult, and the untidiness makes it worth examining.

There is a concrete starting point: a [human fibroblast culture experiment found increased collagen synthesis without an increase in cell number](https://pubmed.ncbi.nlm.nih.gov/3169264/). Fibroblast culture means cells grown in a laboratory; that setting gives the finding its particular force and its particular boundary. The cells changed their collagen production. A face was never the measuring instrument in that experiment.

Then comes the preparation. A [review of topical GHK describes poor passage through the stratum corneum, the outer skin barrier](https://pmc.ncbi.nlm.nih.gov/articles/PMC11830136/). The same review considers ways of improving delivery. The engaging complication follows: the interesting ingredient still has somewhere to get to.

## Formulation entries

The [collagen culture](/collagen) is the place to examine a sharply defined laboratory result and the much broader gene-expression argument that grew around GHK. The precision of the cell experiment is persuasive; the later argument asks for a larger advance of my confidence.

The [skin studies](/skin) turn to the cosmetic outcomes. A percentage describing increased procollagen synthesis can easily acquire a grander meaning in the imagination. The original outcome has to come back into focus before the number earns my confidence.

The [skin-penetration entry](/delivery) [follows copper through laboratory skin](https://pmc.ncbi.nlm.nih.gov/articles/PMC3016279/). Its measurements make delivery tangible, while leaving a separate question about the cosmetic value of what arrived.

Finally, the [hair-growth combination](/hair) supplies the most awkward ingredient list here: [a human trial used GHK together with another compound](https://pmc.ncbi.nlm.nih.gov/articles/PMC4969472/), while [a separate laboratory paper tested a different copper peptide](https://pubmed.ncbi.nlm.nih.gov/17703734/). Those particulars are the reason to open the papers.

> My pencil goes beside the carrier. The [topical review’s delivery problem](https://pmc.ncbi.nlm.nih.gov/articles/PMC11830136/) makes the cream around an ingredient worth taking seriously.

## The appeal of a finished formula

The attraction of a finished-sounding name is easy enough to understand. The more interesting research leaves the preparation open to examination: which compound was present, where it went and what changed after it got there.

A [trial of a GHK-containing hair formulation](https://pmc.ncbi.nlm.nih.gov/articles/PMC4969472/) is a good example. Its combination and its measured hair counts give it a character of its own. Reducing it to a slogan about copper peptides would throw away the very features that make it useful.

The [reading list](/references) brings these experiments and reviews together. The [about page](/about) explains the question behind the title.

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Formula Med Spa houses my curiosity about published research on cosmetic formulations, an editorial site with no healthcare business behind it and no medical advice to give.