Reviewed by Dr. Jason Wright, D.O. · September 23, 2026
The science
How it works
Delivers copper where it’s needed
GHK binds copper tightly and hands it to the enzymes that require it, including lysyl oxidase, which cross-links collagen and elastin.
Signals fibroblasts
Tells dermal fibroblasts to produce collagen I and III, elastin, and the glycosaminoglycans that hold water in the skin.
Balances breakdown and rebuilding
Influences matrix metalloproteinases and their inhibitors (TIMPs). Remodeling needs both sides, which is why results build over weeks rather than days.
Shifts gene expression
Lab data show GHK moves the activity of thousands of genes toward repair patterns. That is cell-study evidence, not proof of reversing aging in people.
In lab research, GHK shifts the activity of thousands of human genes toward patterns linked to repair. It’s a striking cell-study finding, not proof that it reverses aging in people.
Dosing
Your dosing plan
Dr. Wright sets your exact dose within this range at your visit.
Standard protocol
FormSubcutaneous
Dose1–2 mg (10–20 units)
Schedule5 days on, 2 off
Based onAnimal studies, clinical use
Course
FormEvening dosing
Dose4 to 8 weeks
ScheduleThen a break
Based onClinical practice
Side effects
Side effects and what to expect
Stinging, redness, or irritation at the injection siteCommon · First few weeks
Rotate sites. Dr. Wright can have it diluted further if needed.
FlushingUncommon · First doses
Usually passes on its own.
Brief metallic tasteOccasionally reported · Minutes after injecting
Harmless; fades on its own.
Sensitivity to copperRare · Any time
Stop and contact the practice.
A note from Dr. Wright
I spend my days thinking about how skin heals. GHK-Cu has more human research behind it than most peptides, though the strongest studies used creams rather than injections. It still earns a place in my practice, especially alongside procedures and regenerative work.
Dr. Jason Wright, D.O. · Board certified, American Board of Cosmetic Surgery
Cost & access
Getting started with GHK-Cu
GHK-Cu
50 mg in a 5 mL vial (10 mg/mL) · Labeled in your name
Stinging at the injection site is common with GHK-Cu. Rotating sites helps, and Dr. Wright can have it diluted further.
Why an injection instead of a cream?
Injection delivers GHK-Cu throughout the body, for tissue repair as well as skin. The published skin studies used creams, so the injectable has less human research behind it.
Will it help with hair loss?
It supports follicles, but it doesn’t block DHT. For male pattern hair loss, it works best alongside standard treatment.
How long is a course?
4 to 8 weeks, 5 days on and 2 off, then a break before repeating.
Research
Supporting studies
GHK-Cu increases collagen I and III, elastin, and glycosaminoglycan synthesis
Pickart L, Margolina A. International Journal of Molecular Sciences, 2018 (review)
