Public COA audit
GHK-Cu
Audited September 5, 2026
Several fields check out, but we found issues worth reviewing before you rely on this document.
- Legitimacy
- 92
- Confidence
- 93%
- Panels
- 3/7
- Purity (printed)
- 99.7%
Scored high because the document is mostly consistent but carries soft concerns, limited panel coverage (3/7), and 2 soft concerns. To improve: include identity, purity, and endotoxin at minimum.
Document details
Fields extracted from the certificate — not order or payment data.
- Batch / lot
- CR-GCU100-2603-1
- Identity method
- FTIR (USP <197A>)
- Sample date
- 2026-04-02
- Issue date
- 2026-04-05
Original certificate
Embedded copy of the stored COA PDF or image. Download it for your records — PeptIQ’s audit is separate from the lab document itself.
7-panel checklist
Had data + good, had data + bad, reported without pass/fail, or missing. Missing lowers thoroughness — you decide whether that panel matters; PeptIQ’s score still factors coverage.
3 of 7 present · 3 passed · 0 failed · 0 reported · 4 missing
Missing is a thoroughness gap — not automatically bad. PeptIQ’s legitimacy score still weighs panel coverage; you can down-weight panels that don’t matter for your use case.
Identity
Tested · passed · core
Compound identity confirmed (e.g. HPLC, mass spec).
FTIR sample spectrum confirms the presence of GHK-Cu with addition of excipient(s)/fillers
Purity
Tested · passed · core
Reported purity percentage for the analyte.
99.7%
Heavy metals
Not on this certificate file
Lead, arsenic, cadmium, mercury, or similar limits.
No evidence on this file. Vendors sometimes publish separate purity and endotoxin reports for the same lot — check the brand page before treating this as “never tested.”
Microbial
Not on this certificate file
Bioburden / microbial limits testing.
No evidence on this file. Vendors sometimes publish separate purity and endotoxin reports for the same lot — check the brand page before treating this as “never tested.”
Endotoxin
Tested · passed · core
LAL or chromogenic endotoxin assay.
12.2 EU/vial (limit: 40 EU/vial)
Sterility
Not on this certificate file
Sterility testing where applicable.
No evidence on this file. Vendors sometimes publish separate purity and endotoxin reports for the same lot — check the brand page before treating this as “never tested.”
Residual solvent / water
Not on this certificate file
Residual solvents or water content limits.
No evidence on this file. Vendors sometimes publish separate purity and endotoxin reports for the same lot — check the brand page before treating this as “never tested.”
How to read this
Had data · good
Panel present with a pass (or clear acceptance).
Had data · bad
Panel present with a fail — a concrete quality signal.
Had data · unclear
Value reported without an explicit pass/fail mark.
Missing on this file
Not on this certificate file. Lowers file thoroughness; a sibling endotoxin/purity report for the same lot may still exist. PeptIQ’s score still factors coverage.
Findings
Evidence-linked observations from this audit.
High HPLC purity
99.7% purity by HPLC (USP <621>) meets specification of ≥98%. This is normal for research-grade peptides.
FTIR identity confirmed
FTIR spectrum confirms GHK-Cu identity with excipients/fillers present, consistent with formulated peptide product.
Endotoxin testing performed
Separate endotoxin report (page 3, dated 4/10/2026) shows gel clot LAL test result of 12.2 EU/vial, passing the 40 EU/vial specification.
Lot number consistent
Lot CR-GCU100-2603-1 appears on both purity/identity report and endotoxin report with matching visual descriptions.
BTLabs contact information
Lab name, address (5730 Corporate Way, Suite 220, West Palm Beach, FL 33407), phone (561-625-0133), and website (https://btlabtesting.com) are provided.
Professional multi-page report
Report includes detailed FTIR and HPLC chromatograms, QR code, signatures from two scientists (Andrea Castro and Verna Zheng), and consistent formatting across pages.
Potency variance across measurements
HPLC potency shows three measurements: 113 mg (112.9%), 68.3 mg (68.3%), and 72.2 mg (72.3%). The first exceeds specification (90-110% of 100 mg), while the latter two are below. This may reflect sampling variability or inhomogeneous distribution in the vial.
Limited panel scope
Testing purpose explicitly states this does not provide information on particulate matter or microbial contamination. Heavy metals, sterility, and residual solvents/water content not tested.
PeptIQ COA reports analyze document content and publicly verifiable lab signals. They are educational and not a guarantee of product quality, legality, or safety. Always consult a qualified professional before making health decisions. We never publish purchase prices, shipping details, or uploader identity.