GHK-Cu Copper Peptide: Research Applications Explained

GHK-Cu is a tripeptide-copper complex naturally found in human plasma. It is one of the most studied peptides for skin and connective-tissue research.

What is it?

The molecule consists of glycyl-L-histidyl-L-lysine bonded to a copper(II) ion. The copper is essential to its biological activity — uncomplexed GHK is much weaker.

Research applications

Skin remodelling and collagen synthesis studies
Hair-follicle research
Wound-healing models
Antioxidant pathway research

Typical research dose

1–2 mg subcutaneous, several times weekly, is the most-cited research dose.

Reconstitution

50 mg vial in 5 ml BAC water gives a 10 mg/ml mix. 0.1 ml = 1 mg.

Why is GHK-Cu blue?

The copper complex absorbs visible light and gives the solution a vivid blue. A vial that is completely clear is not GHK-Cu.

Frequently asked questions

Is the blue colour normal?

Yes — it is the copper complex. Clear solution = no copper.

Can it be applied topically?

Topical GHK-Cu formulations exist; research use is generally subcutaneous.

Where do I buy GHK-Cu in the UK?

See our products page.

This guide is provided for informational purposes by Next Day Pharma. All peptides supplied are FOR RECONSTITUTION. Always consult a qualified healthcare professional before use.

Peptide catalogue

Melanotan II — £40.00 — 10mg of Melanotan II
Somatropin (HGH) — £60.00 — Somatropin (Human Growth Hormone)
Cagrilintide 10mg — £60.00 — 10mg of Cagrilintide
Epitathlon — £50.00 — 10mg of Epitathlon
PT-141 10mg — £40.00 — 10mg of PT-141
SLU-332 5mg — £65.00 — 5mg of SLU-332
CJC + Ipamorelin — £55.00 — 5mg CJC-1295 + 5mg Ipamorelin
5 Amino 1MQ 50mg — £60.00 — 50mg of 5 Amino 1MQ
SS-31 10mg — £40.00 — 10mg of SS-31
Semax 10mg — £40.00 — 10mg of Semax
Selank 10mg — £40.00 — 10mg of Selank
Ipamorelin 10mg — £40.00 — 10mg of Ipamorelin
Wolverine — £75.00 — 10mg of Wolverine
MOTS-C 20mg — £80.00 — 20mg of MOTS-C
Tesamorelin 20mg — £110.00 — 20mg of Tesamorelin
NAD+ 1000mg — £125.00 — 1000mg of NAD+
GLO 70mg — £70.00 — 70mg of GLO
KLOW 80mg — £90.00 — 80mg of KLOW
BPC-157 10mg — £40.00 — 10mg of BPC-157
TB500 10mg — £50.00 — 10mg of TB500
Retatrutide — £200.00 — Retatrutide
Tirzepatide — £180.00 — Tirzepatide
MT2 10mg (NEXT DAY TAN) — £50.00 — 10mg of Melanotan2
GHK-CU 100mg — £60.00 — 100mg of GHK-CU

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Where to buy GHK-Cu in the UK — Copper peptide for skin, hair and recovery: amounts, cycling and storage.
Where to buy TB-500 in the UK — Loading and maintenance amounts, and how TB-500 compares with BPC-157.
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