The blue color comes from the copper(II) ion bound to the GHK tripeptide. It is a normal characteristic of the reconstituted solution.

Subcutaneous or topical?

Both routes are used. Subcutaneous is associated with systemic effects; topical is most often used for cosmetic skin and scalp applications.

GHK-Cu Calculator

Also known as: Copper Peptide

Healing

Default: 50mg / 5mL / 2mgAdjust inputs to match your vial

About

What is GHK-Cu?

GHK-Cu is the human-derived tripeptide glycyl-L-histidyl-L-lysine bound to a copper ion. It is used both subcutaneously (for systemic effects on collagen synthesis and wound healing) and topically (for skin and hair). Subcutaneous dosing protocols are typically 1–3 mg per dose.

Common vial sizes

50 mg	lyophilized powder
100 mg	lyophilized powder
200 mg	lyophilized powder

Reference dose ranges

1 mg	≈ 10 U-100 units (at 50mg / 5mL)
2 mg	≈ 20 U-100 units (at 50mg / 5mL)
3 mg	≈ 30 U-100 units (at 50mg / 5mL)
5 mg	≈ 50 U-100 units (at 50mg / 5mL)

Reconstitution

How it's typically prepared

Vials are typically blue-tinted because of the copper complex. Reconstitute with BAC water; refrigerate. Avoid contact with metal — use plastic syringes only.

FAQ

Frequently asked questions

Why is GHK-Cu blue?: The blue color comes from the copper(II) ion bound to the GHK tripeptide. It is a normal characteristic of the reconstituted solution.
Subcutaneous or topical?: Both routes are used. Subcutaneous is associated with systemic effects; topical is most often used for cosmetic skin and scalp applications.

Sources

References

PubMed search: GHK-Cu copper peptide

Other Healing peptides

Notice

PeptideDose is an educational reference. It is not medical advice and does not replace consultation with a licensed healthcare provider. Doses shown in presets are derived from published protocols and product labels — they are not personal recommendations.