Two related forms, separate evidence
GHK is the copper-free peptide; GHK-Cu is its copper complex. They share this page for comparison. Findings for one form are not assigned to the other. The main profile below concerns GHK-Cu.
The short version
Research spans skin preparations, animal models and other exposures. The selected human trial below tested a topical regimen after laser treatment.
An investigational profile is not an endorsement or a finding of safety.
Names you may see
Compound names, research identifiers, brand names and informal shorthand serve different purposes.
- GHK-Cu
- Entry name · The name used for this encyclopedia topic.
- GHK Cu
- Recorded name variation · A name associated with this entry; check exact ingredient, modification, formulation and context.
Similar names do not establish identical ingredients, molecular variants, product quality or interchangeable preparations. A blend nickname may describe different formulas.
Things worth checking
Does using a copper peptide mean I need zinc?
That is a question to evaluate, not an automatic supplement recommendation. NIH explains that excessive zinc can interfere with copper absorption and cause copper deficiency. Dietary mineral guidance does not establish a GHK-Cu-specific supplement regimen or protection from an injection.
General mineral guidance · GHK-Cu-specific evidence not established · NIH Office of Dietary Supplements · Copper ↗
Questions to bring to a clinician or pharmacist
- Which findings apply to my goal and medical history?
- Could my medicines, supplements, or other compounds change the assessment?
- What monitoring, if any, would inform a decision—and what symptoms would need evaluation?
Monitoring is individual. Normal bloodwork does not establish that a compound or preparation is safe.
Delivery methods
How a compound is delivered can change the question being studied. These selected examples explain the route, purpose and evidence limits; they do not establish an appropriate route for an individual.
Topical skin care
Small randomized human study
- Why it was studied or discussed
- Post-laser skin outcomes in the selected human study.
- What this means for the reader
- This procedural setting does not establish injectable benefit.
Injectable preparation
Regulatory safety context
- Why it was studied or discussed
- A separate safety question from topical skin care.
- What this means for the reader
- FDA’s notice addresses limited human safety information for injectable compounded GHK-Cu; topical findings cannot settle this question.
This is a selected comparison, not an exhaustive list of preparations or a guide to administering them. The clinical summaries below identify the route used in each study.
Clinical research
A selected human topical study is summarized below. Patient-reported and objective findings differed; neither establishes injectable benefit or safety.
Topical care after laser resurfacing (2006)
Summary based on: Published abstract
- Study design
- Randomized comparison of post-laser skin-care regimens; blinded evaluators assessed redness.
- Who was studied
- Thirteen patients completed the study after laser resurfacing around the mouth.
- Route and preparation
- Topical skin care after a procedure; not an injection study.
- What was compared
- Posttreatment skin regimens with or without GHK-Cu, assessed through 12 weeks.
- What researchers found
- Objective assessments found no significant between-group improvement in redness resolution, wrinkles or overall skin quality. Patient questionnaires favored the GHK-Cu regimen for perceived skin quality (p=0.04).
- Adverse events and stopping treatment
- The abstract does not supply a complete adverse-event assessment.
- What this leaves unanswered
- Very small study in a specific procedural setting; subjective and objective outcomes differed. It does not establish benefit for all skin products or injections.
- Funding context
- Funding and conflicts have not yet been appraised.
Research terms in everyday language ↗
Selected topical trial and animal papers included. Full-text appraisal, other topical studies and a separate assessment of injectable evidence remain pending.
Read findings in the context of the exact product or preparation, the people studied, and the outcome measured. These draft profiles are starting points, rather than complete systematic reviews.
Community research
Structured community reports can help identify questions worth studying. They are considered separately from controlled studies, with their limitations kept visible.
No community reports published yet.
This profile has no published community dataset. We do not infer a trend or a benefit from missing reports.
How community research will work ↗What we will document about community advice
- The advice
- What people recommend, with dated sources and the scope of the discussions examined.
- The reasoning
- Why contributors believe it helps, without treating that explanation as an established mechanism.
- The evidence
- What supports the claim, contradicts it, or has not been tested.
- The cautions
- Possible downsides, conflicting experiences, and questions for a clinician or pharmacist.
No recommendation or community consensus is established by this framework. Descriptions of how common advice is will need documented source coverage.
A closer look
- Classification
- Copper-peptide research
- Name variations
- Names you may see and important distinctions
- Source type
- Regulatory safety notice
- Reference jurisdiction
- United States
Interpret the source in the context of the preparation and route it discusses. A regulatory notice and a controlled clinical trial answer different questions.
Rat wound-chamber research (1993)
Researchers examined connective-tissue accumulation in experimental wounds in rats. Animal findings do not establish the benefits or risks of a human skin product or injection.
Read the original paper ↗Irradiated rat wound model (2013)
This animal study found no significant differences in its measured wound-flap and blood-vessel outcomes under the stated statistical threshold. Results from one model do not establish that effects are absent in every setting.
Read the original paper ↗This first design edition reserves space for study-by-study summaries, definitions, and technical references as each profile receives editorial review.
Go to the source
Study cards identify whether the summary uses an abstract, full text, or an agency assessment. Follow the linked sources for their original context.
Source reference · Checked 7 November 2026 · Opens in a new tab
For athletes: competition rules are a separate check ↗
GHK (copper-free)
A related-compound entry for GHK (copper-free); the exact modification matters.
Safety depends on the exact compound, preparation, route and purpose. Do not transfer GHK-Cu findings to this preparation. Confirm the sequence, terminal modifications, copper or lipid binding, and route before comparing claims.
Context overview · evidence limits stated · Source checked: 2026-11-08
The short version
This entry distinguishes the copper-free GHK peptide, distinct from its copper complex from GHK-Cu. The related-source link below concerns GHK-Cu, not a direct clinical evaluation of this named preparation.
An investigational profile is not an endorsement or a finding of safety.
Names you may see
Compound names, research identifiers, brand names and informal shorthand serve different purposes.
- GHK (copper-free)
- Entry name · The name used for this encyclopedia topic.
- GHK Basic
- Recorded name variation · A name associated with this entry; check exact ingredient, modification, formulation and context.
- GHK Basic (Tripeptide-1)
- Recorded name variation · A name associated with this entry; check exact ingredient, modification, formulation and context.
Similar names do not establish identical ingredients, molecular variants, product quality or interchangeable preparations. A blend nickname may describe different formulas.
Things worth checking
What should be clarified before interpreting claims?
Do not transfer GHK-Cu findings to this preparation. Confirm the sequence, terminal modifications, copper or lipid binding, and route before comparing claims.
Identity and evidence scope · GHK-Cu fibroblast study · copper-complex context ↗
Questions to bring to a clinician or pharmacist
- Which findings apply to my goal and medical history?
- Could my medicines, supplements, or other compounds change the assessment?
- What monitoring, if any, would inform a decision—and what symptoms would need evaluation?
Monitoring is individual. Normal bloodwork does not establish that a compound or preparation is safe.
Clinical research
Do not transfer GHK-Cu findings to this preparation. Confirm the sequence, terminal modifications, copper or lipid binding, and route before comparing claims.
Research terms in everyday language ↗
This is a bounded context overview, not a completed clinical literature appraisal. The linked source has the scope stated here; related-compound findings are not evidence for this preparation.
Read findings in the context of the exact product or preparation, the people studied, and the outcome measured. These draft profiles are starting points, rather than complete systematic reviews.
Community research
Structured community reports can help identify questions worth studying. They are considered separately from controlled studies, with their limitations kept visible.
No community reports published yet.
This profile has no published community dataset. We do not infer a trend or a benefit from missing reports.
How community research will work ↗A closer look
- Classification
- A related-compound entry for GHK (copper-free); the exact modification matters.
- Name variations
- Names you may see and important distinctions
- Source type
- Related-compound source · not direct variant evidence
- Reference jurisdiction
- Research context; approval is product- and country-specific
Interpret the source in the context of the preparation and route it discusses. A regulatory notice and a controlled clinical trial answer different questions.
This first design edition reserves space for study-by-study summaries, definitions, and technical references as each profile receives editorial review.
Go to the source
Study cards identify whether the summary uses an abstract, full text, or an agency assessment. Follow the linked sources for their original context.
Source reference · Checked 8 November 2026 · Opens in a new tab
For athletes: competition rules are a separate check ↗