§ 01 Overview
Overview
Copper-binding tripeptide with broad effects on wound healing, collagen synthesis, and hair follicle function.
Strong dermatological evidence. Used topically in clinical and cosmetic formulations with published RCTs.
§ 02 Mechanism
Mechanism of action
GHK-Cu acts as a copper carrier and modulates gene expression across hundreds of genes involved in collagen and elastin synthesis, anti-inflammatory pathways, and stem cell activity. It has been shown to reset gene expression to more youthful patterns in vitro.
- 01Improved skin firmness and elasticity
- 02Reduced appearance of fine lines
- 03Hair follicle support
- 04Wound healing in clinical settings
§ 03 Dosing
Dosing protocol
Standard Protocol
- Vial
- 50 mg or 100 mg (injectable)
- BAC Water
- 2 ml BAC water
- Dose Range
- 1 – 3 mg per dose (injectable)
- Starting Dose
- 1 mg SubQ
- Route
- SubQ
- Timing
- PM
- Frequency
- Daily or EOD
- Cycle
- 4–8 weeks
§ 04 Evidence
Evidence & research
Strong dermatological evidence. Used topically in clinical and cosmetic formulations with published RCTs.
FDA Status
Cosmetic ingredient approved for topical use. Injectable form not FDA-approved as a drug.
§ 05 Stacks
Common stacks
§ 06 News
In the news
8 articles from the last 12 months · updates hourly
Copper Peptides Are Having a Moment: Here’s What GHK-Cu Can Actually Do for Your Skin - Style Rave
Copper Peptides Are Having a Moment: Here’s What GHK-Cu Can Actually Do for Your Skin Style Rave
GHK-Cu Peptide: Current Research on Copper-Associated Cellular Signaling - Khaama Press
GHK-Cu Peptide: Current Research on Copper-Associated Cellular Signaling Khaama Press
Copper Snap Reviews 2026: Could This 10% GHK-Cu + SNAP-8 Serum Be the Peptide Skincare Upgrade You've Been Looking For? - newswire.com
Copper Snap Reviews 2026: Could This 10% GHK-Cu + SNAP-8 Serum Be the Peptide Skincare Upgrade You've Been Looking For? newswire.com
GHK-Cu Peptide Launched By Kylo Peptides for Laboratory Research Applications - The Manila Times
GHK-Cu Peptide Launched By Kylo Peptides for Laboratory Research Applications The Manila Times
New trend of injecting banned peptides to 'optimise' body - France 24
New trend of injecting banned peptides to 'optimise' body France 24
Copper Peptides Aren’t New, But They’re Finally Getting Their Due - NewBeauty
Copper Peptides Aren’t New, But They’re Finally Getting Their Due NewBeauty
Celebs Are Injecting Copper to Look Younger. What Could Go Wrong? - The Hollywood Reporter
Celebs Are Injecting Copper to Look Younger. What Could Go Wrong? The Hollywood Reporter
BPC-157, TB-500, and GHK-Cu Peptide Blend in Regenerative Research - The Sunday Guardian
BPC-157, TB-500, and GHK-Cu Peptide Blend in Regenerative Research The Sunday Guardian
§ 07 Sourcing
Sourcing & supply
Regulatory status
Restricted from compounding
Placed on the FDA's 503A Category 2 list and cannot be lawfully compounded in the US. No brand pharmacy alternative exists. US buyers encounter only research-use-only (RUO) channels, which the FDA's Intended Use Doctrine treats as unapproved drug sales.
503B pharmacies · 2
Olympia Pharmaceuticals
Rx required35+ year family-owned dual 503A/503B licensed in 48–49 states. Among the cleanest mid-sized 503Bs operating today.
Hallandale Pharmacy (Pharmcore)
Rx required503A with historic warning letter (2020, closed out 2022). Major telehealth fulfillment partner.
Telehealth (Rx) · 2
International · 5
Rupharma
12+ year Russian pharmacy reseller. Reviews.io 4.84/5 (81+). Has a genuine US warehouse for common peptides.
Trident Peptides
1,299+ Trustpilot reviews (5-star). Strongest review base in UK research peptides. No visible ISO/GMP; COAs not posted.
Direct Peptides
Multi-region geo-routed mirrors. Multiple credible scam complaints. Documented customs seizures. Avoid absent stronger evidence.
Pharma Lab Global
Budget pricing but significant QC concerns. Claims HPLC+MS 'on request' not displayed.
Canlab
Health Canada public warning December 2023. Operates across mirror domains to evade takedowns. Avoid.
Research-use-only · 7
Swiss Chems
Established SARMs/peptide vendor. FDA warning letter Dec 2024 for GLP-1s. Weaker peptide QC than SARMs QC.
Limitless Life Nootropics
'Only BBB-accredited peptide company' (since 2020). Claims three-lab third-party testing. Broad catalog.
Core Peptides
Broad catalog, widest payment range. Mid-credibility: Knoji 2.5/5 and one scam-impersonation report.
Ascension Peptides
Among newer RUO vendors with cleaner credibility signals. SafeCert Labs (CLIA-certified) testing, 4.8 Trustpilot. US-only.
Modern Aminos
Multi-vial batch third-party testing. 5-star Trustpilot (1,400+ reviews). US- and EU-facing.
Peptide Warehouse
US-made, independent third-party testing including endotoxin and heavy-metal panels. Distinct from similar-sounding copycat domains.
BioTech Peptides
Claims >99% purity via HPLC + MS. Accepts cards and PayPal. 30-day money-back.
Listings are informational, not endorsement. Verify credentials and flags against FDA and PCAB databases before purchasing. Full directory & how to verify →
§ 09 Safety
Safety & side effects
Side effects
- 01Copper accumulation risk at very high doses
- 02Injection site tingling
- 03Skin darkening rare
Contraindications
None specified.
§ 10 Questions
GHK-Cu FAQ
- What is GHK-Cu?
- Copper-binding tripeptide with broad effects on wound healing, collagen synthesis, and hair follicle function. GHK-Cu acts as a copper carrier and modulates gene expression across hundreds of genes involved in collagen and elastin synthesis, anti-inflammatory pathways, and stem cell activity. It has been shown to reset gene expression to more youthful patterns in vitro.
- What is GHK-Cu used for?
- Reported uses include improved skin firmness and elasticity, reduced appearance of fine lines, hair follicle support, and wound healing in clinical settings. Evidence strength is rated Clinical — see the evidence section for detail.
- How is GHK-Cu dosed?
- Commonly referenced dosing is 1 – 3 mg per dose (injectable), typically daily or eod, administered SubQ. This is educational reference only; consult a licensed clinician before use.
- How do you reconstitute GHK-Cu?
- For GHK-Cu, vials commonly come in 50 mg or 100 mg (injectable) and a common reconstitution is 2 ml BAC water. Use the reconstitution calculator to convert any vial size and water volume into exact insulin-syringe units.
- What are the side effects of GHK-Cu?
- Commonly reported side effects include copper accumulation risk at very high doses, injection site tingling, and skin darkening rare. This list is not exhaustive.
- Is GHK-Cu legal?
- Placed on the FDA's 503A Category 2 list and cannot be lawfully compounded in the US. No brand pharmacy alternative exists. US buyers encounter only research-use-only (RUO) channels, which the FDA's Intended Use Doctrine treats as unapproved drug sales. FDA status: Cosmetic ingredient approved for topical use. Injectable form not FDA-approved as a drug..