Are GHK-Cu and BPC-157 stable as lyophilised powders?

Yes. Both are stable for 24+ months at 2–8 °C lyophilised. GHK-Cu is light-sensitive - store in amber vial - and reconstituted solutions should be used within 30 days. BPC-157 reconstituted solutions are typically used within 14 days at 2–8 °C.

Can GHK-Cu and BPC-157 be combined in research protocols?

In published in-vitro literature both are sometimes used in parallel research models for tissue-repair characterisation. However, mixing two peptides in a single reconstituted vial is not recommended in laboratory practice - pH and chelation chemistry differ. Researchers typically reconstitute each peptide in its own vial and dose separately in their experimental protocol.

Is the copper in GHK-Cu necessary for activity?

In published research the copper is integral to GHK-Cu's characterised activity. The free GHK tripeptide binds Cu²⁺ ions with high affinity, and the resulting complex is what is studied in most published literature. Free GHK without bound copper has different chemistry and a separate research profile.

GHK-Cu vs BPC-157 Research Comparison

Q: What is the main difference between GHK-Cu and BPC-157?

GHK-Cu is a tripeptide-copper complex (Gly-His-Lys + Cu²⁺) studied for collagen-modulating and skin-research pathways. BPC-157 is a 15-amino-acid pentadecapeptide derived from a fragment of human gastric juice protein, characterised in tissue-repair and gut-research literature. They share the broad 'regenerative research' category but have completely different chemistry and mechanism.

At a Glance

	GHK-Cu	BPC-157
Class	Tripeptide-copper complex	Pentadecapeptide
Sequence	Gly-His-Lys (GHK) + Cu²⁺	GEPPPGKPADDAGLV
Residue count	3 amino acids	15 amino acids
Molecular weight	~401.84 g/mol (Cu-complex)	~1,419.55 g/mol
CAS Number	89030-95-5 (Cu complex)	137525-51-0
Research category	Dermal / collagen research	Tissue-repair / gut research
Reference page	GHK-Cu →	BPC-157 →

GHK-Cu - Copper-Binding Tripeptide

GHK-Cu is the smallest peptide in our regenerative-research category. It comprises just three amino acids - Glycine-Histidine-Lysine - bound to a Cu²⁺ ion. The peptide chelates copper with very high affinity through histidine's imidazole nitrogen, lysine's α-amino group, and a glycine carbonyl, forming a square-planar complex characterised in published copper-coordination chemistry literature.

GHK was first identified in 1973 as a plasma factor that influenced fibroblast growth in vitro. Since then it has accumulated a substantial body of dermal-research literature focused on collagen synthesis, decorin expression, and antioxidant pathways. The Pickart and Margolina 2018 review surveys roughly 600 published studies. GHK-Cu is widely used as a reference compound in cosmeceutical research and dermal-fibroblast assays.

Just 3 residues - smallest peptide in our regenerative range
Copper chelation defines the bioactive complex
Hundreds of published studies in dermal and collagen research
Light-sensitive - supplied in amber vials
Modulator of collagen synthesis pathways in published literature

BPC-157 - Body Protection Compound 157

BPC-157 (Body Protection Compound 157) is a synthetic pentadecapeptide whose 15-amino-acid sequence (Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val) was identified within human gastric juice protein. The peptide is unusually stable in acidic conditions in published stability literature - a defining property that distinguishes it from many other research peptides.

The Sikiric group has published extensively on BPC-157 in preclinical models since the 1990s, with the literature emphasising tissue-repair, tendon and gut-research signals. Mechanism in published studies includes modulation of nitric oxide synthesis pathways, growth-hormone receptor expression in fibroblasts, and angiogenic markers. It is one of the most-cited research peptides in tendon and connective-tissue literature.

15-residue pentadecapeptide derived from gastric-juice protein
Unusual acid stability in published literature
Extensive preclinical literature in tissue-repair research
Modulator of NO-synthesis pathways in published studies
Most-cited research peptide in tendon / connective-tissue work

Mechanism & Chemistry Comparison

Property	GHK-Cu	BPC-157
Sequence length	3 residues + Cu²⁺	15 residues
Metal coordination	Cu²⁺ (essential for activity)	None
Acid stability	Stable	Unusually stable in acidic conditions
Primary research signal	Collagen / decorin expression in fibroblasts	NO synthesis; angiogenesis markers; tendon repair models
Light sensitivity	Yes - store in amber vial	Standard light protection
Reconstituted shelf life	~30 days at 2–8 °C, protect from light	~14 days at 2–8 °C

When Researchers Choose GHK-Cu vs BPC-157

Reasons to select GHK-Cu

Dermal-fibroblast or collagen research: GHK-Cu is the canonical reference in this literature.
Copper-coordination chemistry studies: The defined Cu²⁺-binding geometry makes GHK-Cu valuable in metallopeptide research.
Antioxidant pathway research: Published studies characterise SOD-mimetic and ROS-modulating signals.
Cosmeceutical research: Most published topical-research papers reference GHK-Cu.

Reasons to select BPC-157

Tendon / connective-tissue repair models: BPC-157 is the most-cited reference in this preclinical research area.
Gastrointestinal research: Originating sequence and acid stability make it relevant to gut-research literature.
Angiogenesis pathway research: Published studies characterise VEGF and NO-pathway signals.
Acid-stable peptide research: One of the few research peptides documented as stable in low-pH conditions.

Laboratory Handling

Both peptides are supplied as lyophilised powder in sealed glass vials. Reconstitute with bacteriostatic water added slowly down the side wall, swirling gently until fully dissolved. GHK-Cu is light-sensitive - store reconstituted solutions in amber containers and protect from prolonged light exposure. Use the on-site Reconstitution Volume Calculator for mg/mL maths.

Compound	Lyophilised storage	Reconstituted shelf life
GHK-Cu	2–8 °C amber vial, 24+ months	~30 days at 2–8 °C, light-protected
BPC-157	2–8 °C, 24+ months	~14 days at 2–8 °C

Purity & Verification

Both compounds are independently HPLC-verified by Janoshik Analytical at 99%+ purity. Where a Janoshik report has been issued for the current batch it is supplied with the order; otherwise we publish the verification record on the Purity page.

Frequently Asked Questions

What is the main difference between GHK-Cu and BPC-157?

GHK-Cu is a tripeptide-copper complex studied in collagen and dermal research. BPC-157 is a 15-amino-acid pentadecapeptide characterised in tissue-repair literature. Same broad category ("regenerative research") but completely different chemistry.

Which is more widely cited in published literature?

Both are extensively cited but in different research contexts. GHK-Cu dominates dermal / collagen / copper biochemistry; BPC-157 dominates tendon / connective-tissue / gut-research preclinical literature.

Are they stable as lyophilised powders?

Yes - both stable 24+ months at 2–8 °C lyophilised. GHK-Cu is light-sensitive (amber vial). Reconstituted GHK-Cu uses within 30 days; BPC-157 within 14 days.

Can they be combined in research protocols?

In published in-vitro literature both are sometimes used in parallel for tissue-repair characterisation. However, mixing two peptides in a single reconstituted vial is not recommended - pH and chelation chemistry differ. Reconstitute and dose separately.

Is the copper in GHK-Cu necessary?

In published research the copper is integral to characterised activity. Free GHK without bound copper has different chemistry and a separate research profile.

GHK-Cu vs BPC-157