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Vendor Transparency Comparison

GHK-Cu
Vendors Scored on Transparency

13 scored vendors carry this compound · Ranked high to low by VTS · Updated August 2026

Every vendor in PeptideClear's scored catalog that publicly lists GHK-Cu, ranked by their Vendor Transparency Score. VTS measures what a researcher can verify before purchasing - third-party testing practices, COA accessibility, batch traceability, and operational disclosure - from publicly available materials only. It is not a rating of product quality, purity, or safety. If you are sourcing this compound, transparency is the variable within your control.

No affiliate revenue. PeptideClear takes no cut from any vendor listed here. Vendors are scored whether or not they want to be. Every scored point traces to a public source. How VTS scoring works →
Scored vendors carrying GHK-Cu (13)
Vendor Band VTS Key transparency finding
BioLongevity Labs biolongevitylabs.com High 94 Triple third-party testing per batch - HPLC, LC-MS, sterility, and endotoxin - by named independent labs, with COAs downloadable before purchase. GHK-Cu listed as a 50mg standalone vial.
Verified Peptides verifiedpeptides.com High 80 500+ published batch COAs with HPLC purity and identity data; lot numbers and testing dates publicly accessible. GHK-Cu available as standalone vials and in powder format.
Ion Peptides ionpeptide.com Moderate 78 Lot-specific COAs linked from product pages; HPLC and MS testing per batch; WHO GMP and ISO 9001:2015-aligned manufacturing stated.
Peptide Crafters peptidecrafters.com Moderate 76 Triple-batch analysis with HPLC-MS, endotoxin, and sterility testing; US lyophilization stated; public policy pages present.
Eternal Peptides eternalpeptides.com Moderate 76 Janoshik COAs published per lot and linked from product pages; HPLC and MS confirmed. GHK-Cu available as a standalone and in the GLOW blend.
Ascension Peptides ascensionpeptides.com Moderate 76 Public COA library with named labs; HPLC and MS per batch. GHK-Cu listed as a standalone 100mg vial and in the GLOW and KLOW blends.
Alpha Omega Peptides alphaomegapeptide.com Moderate 64 GMP-certified US manufacturing; COA documentation stated per batch. GHK-Cu listed as standalone and in GLOW and KLOW recovery blends.
Sko Compounds sko-compounds.com Moderate 65 COAs publicly listed per product on the /coas page; HPLC testing stated. GHK-Cu confirmed in the public COA index alongside the GLOW blend.
PureRawz purerawz.co Limited 59 Broad catalog with COAs stated per batch; accessibility inconsistent. GHK-Cu available as a standalone vial and in a BPC-157 + TB-500 + GHK-Cu blend.
Biotech Peptides biotechpeptides.com Limited 59 US synthesis stated; COAs available but not consistently pre-purchase accessible. GHK-Cu confirmed in the GLOW blend catalog listing.
Blue Sky Peptide blueskypeptide.com Limited 55 Established US vendor; COA documentation inconsistent. GHK-Cu listed as a 50mg standalone vial and in the GLOW and KLOW blends.
Apex Peptides apex-peptides.com Limited 44 60+ compound catalog; COAs available on request. GHK-Cu listed in the tissue research range alongside BPC-157 and TB-500.
Planet Peptide planetpeptide.com Low 26 Broad catalog including full GLP-1 range; minimal verifiable documentation publicly accessible before purchase. No named testing lab or entity details disclosed at time of scoring.
How to read this table
VTS measures transparency, not product quality
A high VTS score means a vendor publishes verifiable documentation about their testing process before you purchase. It is not a guarantee of purity, potency, or safety. A low VTS score means less is publicly verifiable - not that the product is necessarily inferior. The ranking exists so you can make an informed choice about what level of documentation you require for your research.
All scored vendors carrying GHK-Cu are listed, not just top scorers
This page shows every vendor PeptideClear has scored that publicly lists BPC-157. Low-scoring vendors are included because their position in the ranking is itself useful information - the gap between a 94 and a 20 tells you something meaningful about the documentation landscape for this compound.
Scores reflect publicly accessible information only
VTS is scored from what a researcher with no prior account can access and verify. COAs behind login walls, email-on-request systems, or account-gated catalogs are treated as non-public. This mirrors the experience of a real buyer comparing options before committing to a vendor.
Why some scored vendors are not on this page
Two scored vendors - Protide Health (88/High) and Umbrella Labs (81/High) - carry GHK-Cu but require account registration or have catalog structures that limit public pre-purchase verification of specific products. Both are excluded here for the same reason as on all comparison pages: this page applies the public-visibility standard consistently.
Vendor carry data verified from each vendor's canonical domain, August 2026. VTS scores reflect the most recent scoring log for each vendor - see individual vendor pages for full dimension breakdowns and sourcing. VTS measures process transparency from publicly available materials only. It is not a certification of product safety, purity, or efficacy. PeptideClear has no affiliate, referral, or commercial relationship with any vendor listed on this page. Vendors are scored whether or not they want to be. VTS methodology →