# GHK and 5-aminolevulinic acid

> The hair complex — Alliance Aesthetics — A combination hair trial and a copper-peptide analog at Alliance Aesthetics: which preparation earned which result?

**Copper peptide essays**

A positive human result, a companion ingredient, and a different copper peptide whose initials are easy to overlook.

## GHK with 5-aminolevulinic acid

The [hair trial followed 45 men with androgenetic alopecia for 6 months](https://pmc.ncbi.nlm.nih.gov/articles/PMC4969472/). Its active preparation paired GHK with 5-aminolevulinic acid. Hair counts increased significantly versus placebo, and the entry reports no adverse events in any group. That last observation belongs to this trial and its duration; it cannot establish tolerability for every preparation or use.

I consider the human hair-count signal worth taking seriously. The credit belongs to the combination that produced it. A result from that preparation leaves the separate contributions of its ingredients unresolved, and the record identifies a GHK-containing complex rather than pure GHK-Cu.

The paper's title is unusually useful here: it names both partners. Leaving either one out of an account would remove information about the intervention before the argument even began.

![A gloved hand holding a magnifier over loose hair beside a brass clip](images/hair-specimen.webp)

*Staged editorial still life about examining hair; the loose specimen illustrates neither a participant nor a treatment outcome.*

## AHK-Cu in follicles and cells

A separate [hair-follicle and dermal-papilla study tested AHK-Cu, the alanyl analog of GHK-Cu](https://pubmed.ncbi.nlm.nih.gov/17703734/). It reported elongation of human hair follicles outside the body and proliferation of dermal papilla cells in culture, along with reduced apoptosis, the cell-death outcome examined in the experiment.

That is a different peptide and a different setting. I enjoy this sort of close relative because it turns an apparent repetition into a useful comparison of questions: the human trial asks about a combination's hair-count outcome, while the analog experiment concerns follicles and cultured cells. The resemblance of the peptide names can make the distinction easy to miss.

I would give AHK-Cu full credit for its own experimental findings. Moving them under the GHK-Cu heading would make the record appear more direct than it is.

## A question of attribution

The [combination trial](https://pmc.ncbi.nlm.nih.gov/articles/PMC4969472/) and the [analog experiment](https://pubmed.ncbi.nlm.nih.gov/17703734/) leave me interested in a more discriminating comparison of preparations. Each contributes something specific; treating them as repetitions of the same finding would discard their most informative differences.

For Alliance Aesthetics, this is the attraction of a partnership as a subject. It makes the companions visible. I can be encouraged by a result while remaining exacting about whose result it was. The complete entries sit in the [reading list](/references).

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At Alliance Aesthetics I put copper-peptide partnerships through their paces against published research; this editorial site is not a business and supplies no medical advice.