GHK-Cu: what it is, how it is sold and how to track it

What it is

GHK is a tripeptide: just three amino acids (glycine, histidine and lysine). GHK-Cu is GHK bound to copper. It was first identified in human plasma in the 1970s.

It is one of the few peptides that is also a common skincare ingredient, usually in creams and serums.

How it is usually sold

• As a freeze-dried powder in vials, usually blue because of the copper
• Often in larger amounts per vial than other peptides, such as 50 mg or 100 mg
• In topical cosmetic products, which are a separate category
• In blends, sometimes sold under a brand-style name

Regulatory status

GHK-Cu is used as a cosmetic ingredient. Vials sold for research are not approved medicines. Check the rules where you live.

Storage basics

Sealed vials are usually kept cold and away from light. Mixed vials are typically refrigerated and used within a window you set from the vendor's guidance.

How The Pep Planner helps you track it

Because GHK-Cu vials often hold more than other peptides, double-check the unit when you add it: mg, not g. A wrong unit throws off your stock totals and the reconstitution math. Add the lot number and vendor, and use the calculator when you mix so the amount per mL is saved with the vial.

Common questions

Why is my GHK-Cu blue?

The copper gives it a blue color. Color alone does not tell you purity; the COA does.

Does this page recommend an amount?

No. The Pep Planner is an organizer and tracker. We do not give dosing or medical advice.