Key Takeaways
- GHK-Cu = glycyl-L-histidyl-L-lysine bound to copper ā a naturally occurring peptide your body already produces
- Levels drop by 50%+ after age 60 ā supplementing replaces what you're losing
- Three main uses: skin (collagen, elasticity, anti-aging), hair (follicle growth), wound healing
- Available as injectable or topical (serum/cream)
- One of the most studied copper peptides with decades of clinical research
- KLOW blend from Ascension combines GHK-Cu with BPC-157, TB-500, KPV for a complete healing stack
What Is GHK-Cu?
GHK-Cu is a copper-binding tripeptide ā three amino acids (glycine, histidine, lysine) attached to a copper ion. It was first identified in human plasma in the 1970s by Dr. Loren Pickart, who noticed that it caused aging liver tissue to behave more like younger tissue.
Your body naturally produces GHK-Cu, but levels peak in young adulthood and decline significantly with age. By the time you reach 60, your plasma GHK-Cu levels have dropped by more than half. This decline tracks closely with reduced skin elasticity, slower wound healing, and other signs of aging.
The copper component is important ā it's not just GHK (the peptide), but the copper-bound form that shows the most biological activity. Copper plays a role in collagen crosslinking, antioxidant enzymes, and connective tissue formation.
What GHK-Cu Actually Does
Skin & Anti-Aging
- Stimulates production of collagen types I, II, III ā the structural proteins that give skin firmness
- Activates elastin synthesis ā restoring the "spring" in skin
- Reverses age-related skin thinning
- Reduces appearance of fine lines and wrinkles
- Evens skin tone by modulating melanin synthesis
- Repairs the skin barrier (important for people with eczema, rosacea, or chronic inflammation)
- Clinical data: In a study of 71 women with photoaged skin, daily GHK-Cu cream application for 3 months significantly increased skin density and firmness vs placebo
Hair Growth
- Enlarges hair follicle size (follicle miniaturization is the main cause of pattern hair loss)
- Extends the anagen (growth) phase of the hair cycle
- Reduces inflammation around follicles that can cause premature shedding
- Works best when combined with scalp application (topical) and systemic injection
- Takes 12-16 weeks minimum to show real results ā hair cycles are slow
Wound Healing & Tissue Repair
- Accelerates wound contraction and new tissue formation
- Stimulates blood vessel growth (angiogenesis) ā critical for wound healing
- Reduces scar formation ā modulates MMPs (metalloproteinases) that can cause excessive scarring
- Anti-inflammatory ā reduces oxidative stress and pro-inflammatory cytokines
- Used by some clinicians to speed recovery after aesthetic procedures (laser, microneedling)
Injectable vs Topical GHK-Cu ā Which Is Better?
| Injectable | Topical | |
|---|---|---|
| Delivery | Systemic ā affects the whole body | Local ā affects the applied area |
| Bioavailability | High ā direct bloodstream access | Lower ā absorption through skin layers |
| Best for | Collagen throughout body, wound healing, systemic anti-aging | Face/scalp targeted treatment, wrinkles, fine lines |
| Typical form | 100mg lyophilized vial | 1-5% concentration serum or cream |
| Convenience | Requires reconstitution + injection | Apply like skincare product |
| Cost | $80-120 per 100mg vial | $30-100+ per serum |
Honest take: Most people use both. Topical for targeted skin work and scalp, injectable for systemic anti-aging and healing benefits. They're complementary, not competing.
GHK-Cu Dosage Overview
- Injectable: 1-2mg per day, subcutaneously. Most common setup: 100mg vial + 2mL BAC water = 50mg/mL. A 2mg dose = 40 IU on a U-100 syringe.
- Topical: 2-4% concentration cream or serum, once or twice daily
- Cycle: 8-12 weeks on, 4 weeks off
- Full dosing details: GHK-Cu Dosage Guide
GHK-Cu vs Other Peptides for Skin & Hair
- vs GLP-1s (Retatrutide etc.): Different purpose entirely. GLP-1s target metabolism and weight. GHK-Cu targets tissue repair and skin biology.
- vs BPC-157: Both have wound healing properties. BPC-157 is stronger for tendon/muscle injuries. GHK-Cu has stronger skin and hair effects. They stack well (KLOW combines both).
- vs Matrixyl (topical): Matrixyl is a synthetic peptide that also stimulates collagen. GHK-Cu is naturally occurring and has broader mechanisms including anti-inflammatory and hair effects. Both are valid.
- vs Retinol: Retinol accelerates cell turnover but can irritate. GHK-Cu is gentler and can actually help repair retinol-damaged skin barrier.
Where to Buy GHK-Cu
Ascension Peptides carries GHK-Cu as part of the KLOW blend (50mg GHK-Cu + BPC-157 10mg + TB-500 10mg + KPV 10mg) ā $165. Also available as standalone in the Wolverine Stack for those focused on pure healing.
What to look for: third-party COA, ā„98% purity, US-based manufacturer.
Frequently Asked Questions
What is GHK-Cu copper peptide?
GHK-Cu is a naturally occurring copper-bound tripeptide (glycyl-L-histidyl-L-lysine) found in human plasma, saliva, and urine. It plays a role in wound healing, skin repair, hair growth, and anti-aging. Levels decline naturally with age.
What does GHK-Cu do for skin?
It stimulates collagen and elastin production, reverses age-related skin thinning, reduces fine lines, evens skin tone, and accelerates wound healing. Clinical trials show visible improvements in skin density and firmness within 8-12 weeks.
Does GHK-Cu work for hair growth?
Yes ā GHK-Cu has documented effects on hair follicle size and extending the growth phase. It's most effective when used both topically (scalp) and systemically (injectable). Allow 12-16 weeks for meaningful results.
Is GHK-Cu injectable or topical?
Both are available and commonly used. Topical (serum/cream) works on targeted areas. Injectable delivers systemic effects throughout the body. Many people use both simultaneously.
How long does GHK-Cu take to work?
Skin texture changes: 2-4 weeks. Visible collagen/firmness improvements: 6-8 weeks. Hair growth effects: 12-16 weeks minimum.
What is the KLOW blend?
KLOW is an Ascension Peptides blend combining GHK-Cu (50mg) + BPC-157 (10mg) + TB-500 (10mg) + KPV (10mg) in one vial. It's one of the most popular healing and skin peptide stacks available.
Is GHK-Cu safe?
GHK-Cu has been used in cosmetics for decades and has a well-established safety record. Injectable GHK-Cu is well-tolerated at standard doses. Most side effects are mild and injection-site related.
Where can I buy injectable GHK-Cu?
Ascension Peptides carries GHK-Cu as part of the KLOW blend. See our full guide at /peptides/where-to-buy-ghk-cu-peptide.
The information in this article is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional before starting any new supplement or compound. Results vary by individual.