GHK-Cu
GHK joined to copper. It is studied in skin, tissue, and wound-related research.
Whole vial: 100 mg Vial math ↓
Why people look it up
GHK-Cu is popular in skin-care and repair discussions because it binds copper and has been studied in skin and wound models.
Skin appearanceLIMITED HUMAN EVIDENCE
A 13-person topical study had mixed results and no objective between-group improvement; it did not study this vial. Read source ↗
Wound and tissue repairANIMAL / PRECLINICAL EVIDENCE
Rat work examined tissue-matrix changes during wound healing. Read source ↗
Hair growthINSUFFICIENT EVIDENCE
Hair claims are often mixed with studies of a different copper peptide, AHK-Cu. Read source ↗
The labels show the evidence for each claim. Open a row for its source.
Dosage at a glance
Dosage source summary
- Lower example
- 1 mg/day
- Middle example
- 2 mg/day
- Higher example
- 4 mg/day
- How often
- Daily in these selected accounts
- Time on / time off
- Some describe breaks; others describe continued use without scheduled breaks.
- Route
- Injection discussions; exact route is not always stated.
Selected examples, not a consensus or safety range. Other amounts also appear in public discussions.
These source amounts do not establish a safe human dose for a research vial.
Sources & individual reports
- Public GHK-Cu discussion, including 2 and 4 mg daily reports ↗
- Public account describing 1 mg daily ↗
Selected examples, not a consensus or safety range. Other amounts also appear in public discussions. Source check: 2026-10-18.
Source coverage: 3 reviewed public accounts. Separate examples, not a representative sample.
Report 1 ↗First-person account
- Amount reported
- 1 mg GHK-Cu each time
- How often reported
- daily
- Reported duration / cycle
- about six weeks described; a month break and another round were proposed, not observed
- Route (how it was taken)
- subcutaneous, as stated by commenter
What the account says: The commenter also used a topical GHK-Cu product, BPC-157, collagen, and hyaluronic acid. Perceived skin changes cannot be attributed to the injected GHK-Cu alone.
Product match & source details
Product match: The injectable research product and topical formulation were not independently verified.
r/Peptides firsthand comment · Posted: date not independently verified · Reviewed: 2026-10-03.
Report 2 ↗First-person account
- Amount reported
- 2 mg GHK-Cu each time
- How often reported
- daily during the reported cycle
- Reported duration / cycle
- 30 days on, 14 days off; commenter later said they stopped after getting the skin change they wanted
- Route (how it was taken)
- not stated in the checked comment
What the account says: The commenter also reported taking zinc. The post did not document a controlled skin outcome or verify the product.
Product match & source details
Product match: Exact GHK-Cu formulation and vial were not verified.
r/Peptides firsthand comment · Posted: date not independently verified · Reviewed: 2026-10-03.
Report 3 ↗First-person account
- Amount reported
- 2 mg each time
- How often reported
- daily
- Reported duration / cycle
- four weeks on, one week off, repeated over about three months
- Route (how it was taken)
- subcutaneous, as stated by poster
What the account says: Poster said they had not noticed a result. Other replies in the same thread describe different amounts; this post is not a typical range.
Product match & source details
Product match: The vial and copper-peptide formulation were not verified.
r/Peptidesource firsthand post · Posted: date not independently verified · Reviewed: 2026-10-03.
How much agreement is there? The checked accounts use different routes and formulations. Their amounts must not be pooled into one range.
Public sources last reviewed: 2026-10-03. Product identity and reported results were not independently verified. Source method →
Evidence, sources & vial math
What the research actually showsHuman studies, evidence limits and mechanisms
What has actually been studied?
A small human trial of topical GHK-Cu after laser resurfacing found no objective improvement in redness, wrinkles, or skin quality between groups, although a patient questionnaire differed. Animal and lab work explores wound biology. Neither route speaks directly to this dry vial.
Evidence limits: Small topical-product studies do not establish outcomes, amount, or safety for an injected research vial. Hair and systemic claims need stronger clinical testing.
Product status: Research-vial listings are not FDA-approved medicines. Approved-use labels on this page refer only to the named finished prescription product.
Human research
Topical copper tripeptide after CO2 laser resurfacing 2006
What was found: No significant objective between-group difference in erythema or wrinkles; patient-rated skin quality differed.
Main limit: Very small study of a topical combination product, not this research vial or injection.
Study setup and amounts
- Who
- People receiving circumoral laser resurfacing
- Number of participants
- 13
- Study design
- Randomized skin-care regimen comparison
- Route
- Topical product
- Amount studied
- The abstract does not state a comparable mg amount
- Frequency
- Not extractable from abstract
- Duration
- 12-week follow-up
- Outcome measured
- Erythema, wrinkles, skin appearance, patient questionnaire
Study and prescription-product amounts describe those sources. They do not select an amount for an online research vial.
How researchers think it might work
GHK-Cu is a small peptide bound to copper. Researchers have studied it in skin products and tissue models; the form and route matter.
Show scientific explanation
A small randomized topical study tested GHK-Cu-containing skin products after laser resurfacing. It did not test injection of a dry research vial. Read supporting source ↗
Vial & syringe mathTurn the vial total and liquid volume into concentration and syringe units
Vial & syringe math
Change the vial total and final liquid volume to see what each U-100 syringe mark represents.
The starting 1 mL is a math example. Enter your final mixed volume to update the numbers.
100 U-100 syringe units = 1 mL. These results assume the labeled amount is evenly mixed through the final liquid volume.
Continue in the calculator →About this listingResearch-use-only status, seller names and additional background
A research material is not intended for human use. Its name or lab report does not establish suitability for a person. What research use only means →
Compiled by PeptideWhy · Scientific sources last checked 2026-10-03 · Editorial policy · Corrections