GHK-Cu Side Effects: What Studies and Users Report
What FDA labels and clinical studies report for GHK-Cu, how strong that evidence is, and what is still unknown.
Side effects reported in studies
Side effects reported in published studies, strongest design first. Frequencies are quoted as the source gives them; animal results are labelled.
| Side effect | How common | Study type | Source |
|---|---|---|---|
| Tolerability“Treatment was well tolerated.” | Frequency not stated | Human uncontrolled trialn = 1000 | Journal of cosmetic and laser therapy 2018, PMID 29482481 |
| Adverse effects“There was no adverse effect during and after treatment.” | Frequency not stated | Human case reportn = 1 | Journal of cosmetic and laser therapy 2016, PMID 27064823 |
What is not known
- How common each effect is at the doses people use outside of studies.
- Effects that take longer to appear than the length of the published studies.
- How GHK-Cu interacts with other medicines and supplements.
- Whether research-grade products, which are not checked by the FDA, behave like the material used in studies.
When to get medical help
Get urgent care for: trouble breathing, swelling of the face or throat, a widespread rash, severe or lasting stomach pain, fainting, or an injection site that becomes hot, red and spreading.
This is not a complete list. A doctor or pharmacist can help you judge whether a symptom is related.
Common questions
What are the side effects of GHK-Cu?
Studies we summarise reported tolerability, adverse effects. The table on this page gives how often each happened and links each source.
Is GHK-Cu safe?
Its safety has not been established by an FDA review. GHK-Cu is not FDA approved for any use. Research-chemical products are not checked for purity or dose.
More on GHK-Cu
DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.Legal statusFDA, compounding and WADA status with dates.How to injectSites, syringe types and hygiene, step by step.
Sources
- 1Intradermal injections of a hair growth factor formulation for enhancement of human hair regrowth - safety and efficacy evaluation in a first-in-man pilot clinical study.Journal of cosmetic and laser therapy : official publication of the European Society for Laser Dermatology · 2018PMID 29482481Accessed 2 Oct 2026
- 2Significant improvement in crow's feet after treatment with Jet-M and a mixed solution of copper-GHK, oligo-hyaluronic acid, rhodiolar extract, tranexamic acid, and β-glucan (GHR formulation).Journal of cosmetic and laser therapy : official publication of the European Society for Laser Dermatology · 2016PMID 27064823Accessed 2 Oct 2026
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