Is GHK-Cu the same as the copper peptide in skincare?

Same molecule. The topical cosmetic forms and the injectable research-chemical forms both contain GHK-Cu. Delivery route, dose scale, and intended use differ substantially.

Why is dosing so variable?

Published injectable dosing data is limited compared to well-studied peptides like BPC-157 or semaglutide. The 1–3 mg range reflects what's commonly reported in user logs — this is informational, not a recommendation.

What does the copper do?

GHK's biological activity is most pronounced in its copper-bound form. The copper ion appears to be necessary for many of the observed effects in preclinical studies, particularly wound healing and collagen-related signaling. Copper-free GHK has a different activity profile.

GHK-Cu Reconstitution Calculator

A naturally occurring copper-binding tripeptide. Preclinical research explores roles in skin regeneration, wound healing, and anti-inflammatory pathways.

Informational only. Not medical advice. Consult a licensed healthcare provider before starting, changing, or stopping any protocol.

Reconstitution calculator

GHK-Cu

Vial strength

Bacteriostatic water added

Target dose per injection

Syringe type

Your dose

Draw 20 units

That's 0.2 mL of your reconstituted solution · Concentration 10,000 mcg/mL

This vial gives you 25 doses at 2,000 mcg

About GHK-Cu

Not FDA-approved. Sold as a research chemical. Regulatory status varies by jurisdiction. Users are responsible for legal compliance.

GHK-Cu is a tripeptide (glycyl-histidyl-lysyl) naturally present in human plasma, saliva, and urine, with endogenous levels declining with age. The copper complex form (GHK-Cu) is the bioactive signaling form. Preclinical research has explored its roles in wound healing, collagen synthesis, skin regeneration, anti-inflammatory pathways, and tissue repair — with topical formulations having a long history in cosmetic applications.

Injectable GHK-Cu is less common than topical use, but users tracking subcutaneous GHK-Cu in this app typically log 1,000–3,000 mcg per injection, daily or three times weekly. Half-life is short (~1 hour for the tripeptide itself; copper transfer kinetics are longer). GHK-Cu is NOT FDA-approved as a drug; topical cosmetic formulations are in widespread use.

Frequently asked questions

Is GHK-Cu the same as the copper peptide in skincare?: Same molecule. The topical cosmetic forms and the injectable research-chemical forms both contain GHK-Cu. Delivery route, dose scale, and intended use differ substantially.
Why is dosing so variable?: Published injectable dosing data is limited compared to well-studied peptides like BPC-157 or semaglutide. The 1–3 mg range reflects what's commonly reported in user logs — this is informational, not a recommendation.
What does the copper do?: GHK's biological activity is most pronounced in its copper-bound form. The copper ion appears to be necessary for many of the observed effects in preclinical studies, particularly wound healing and collagen-related signaling. Copper-free GHK has a different activity profile.

Sources

Pickart L, Vasquez-Soltero JM, Margolina A. "GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration." Biomed Res Int. 2015. PMID: 26236730
Pickart L, Margolina A. "Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data." Int J Mol Sci. 2018. PMID: 30042322

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