GHK-Cu (Copper Peptide) is nature's most powerful collagen stimulator — proven to firm skin, reduce wrinkles, support wound healing, and provide deep anti-aging effects at the cellular level. Get a prescription from a licensed U.S. provider. Starting at see pricingnth.
Start Your GHK-Cu Protocol →GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Copper) is a naturally occurring copper peptide complex that was first identified in human plasma in 1973 by biochemist Loren Pickart. GHK-Cu levels are naturally highest in young adults and decline significantly with age — with plasma levels dropping from approximately 200 ng/mL at age 20 to just 80 ng/mL by age 60. This age-related decline in GHK-Cu is directly correlated with the loss of skin firmness, collagen density, and the body's diminished ability to repair tissue effectively.
What makes GHK-Cu remarkable is the breadth of its activity. Research has identified over 4,000 genes that GHK-Cu influences — stimulating genes associated with tissue regeneration, collagen production, antioxidant defense, and cell renewal, while simultaneously suppressing genes associated with inflammation and cancer progression. As a copper carrier, it delivers bioavailable copper directly to tissues, which is an essential cofactor for lysyl oxidase — the enzyme responsible for cross-linking collagen and elastin fibers that give skin its structural strength and elasticity.
Injectable GHK-Cu at PeptidesRx provides systemic delivery of this powerful copper peptide, stimulating collagen synthesis not just at the skin surface but throughout all connective tissues. This distinguishes it from topical GHK-Cu serums, which are limited by skin penetration depth and cannot match the comprehensive tissue effects achievable through subcutaneous administration.
Stimulates fibroblasts to dramatically increase collagen I, III, and IV production — restoring the structural matrix that gives young skin its firmness, bounce, and density.
Upregulates superoxide dismutase (SOD) and other antioxidant enzymes, neutralizing free radicals that accelerate skin aging, DNA damage, and cellular decline.
Accelerates wound closure by promoting keratinocyte and fibroblast migration, stimulating angiogenesis, and orchestrating the full cascade of regenerative healing processes.
Influences over 4,000 genes — upregulating regenerative pathways and suppressing pro-inflammatory genes associated with aging, creating a more youthful cellular environment.
GHK-Cu delivers measurable improvements in skin quality, collagen density, and overall tissue health — with effects visible as early as 4 weeks.
GHK-Cu is ideal for anyone seeking meaningful anti-aging results beyond what topical skincare products can achieve. If you're noticing loss of skin firmness, deepening wrinkles, reduced skin thickness, or overall dullness that doesn't respond to surface treatments, injectable GHK-Cu addresses these changes at their biological root — declining collagen synthesis and reduced cellular repair capacity.
Ideal candidates include adults in their 35–70s noticing visible signs of skin aging, individuals recovering from surgical procedures who want faster scar remodeling, patients who have lost significant weight and are dealing with skin laxity, and anyone seeking a comprehensive anti-aging approach that addresses the internal biology of aging skin rather than just its surface appearance.
GHK-Cu pairs exceptionally well with sermorelin and NAD+ as part of the "Anti-Aging Full Stack" — a comprehensive protocol that addresses growth hormone optimization (sermorelin), cellular energy and DNA repair (NAD+), and collagen production and skin quality (GHK-Cu) simultaneously. Many of our patients use all three for total rejuvenation from the inside out.
GHK-Cu is administered as a daily subcutaneous injection on a cycling schedule to maintain maximum receptor sensitivity and efficacy.
| Phase | Dose | Schedule |
|---|---|---|
| Active Phase (Weeks 1–4) | 1–2 mg | SubQ daily |
| Rest Phase (Weeks 5–6) | Off | 2-week break |
| Cycle Repeat | 1–2 mg | Resume 4-week cycle |
* Cycling prevents receptor desensitization and maintains optimal efficacy. Injection site: belly, thigh, or upper arm. Results become visible at 4–8 weeks. Full protocol designed by your licensed provider.
GHK-Cu begins influencing gene expression and stimulating fibroblast activity. Some patients notice improved skin hydration and a subtle glow as cellular repair processes accelerate.
Skin texture begins to improve noticeably. Early collagen synthesis creates a subtle plumping effect. Fine lines may appear less pronounced. Wound healing and scar remodeling accelerates.
Meaningful improvements in skin firmness, elasticity, and overall tone. Deeper wrinkles begin to soften. Skin feels structurally stronger and more resilient. Hair thickness may improve.
Comprehensive anti-aging effects at their peak. Dramatic improvements in skin quality, density, and youthful appearance. Many patients report looking 5–10 years younger after a complete protocol.
No hidden fees. No insurance required. Provider consultation, prescription, and medication are all included.