Public COA audit

GHK-Cu

Audited July 28, 2026

Mostly consistent, with concerns

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%

Document details

Fields extracted from the certificate — not order or payment data.

Batch / lot
CR-GCU100-2603-1
Identity method
FTIR (USP <197A>) and HPLC (USP <621>)
Sample date
2026-04-02
Issue date
2026-04-05

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 COA

    Lead, arsenic, cadmium, mercury, or similar limits.

    No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.

  • Microbial

    Not on this COA

    Bioburden / microbial limits testing.

    No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.

  • Endotoxin

    Tested · passed · core

    LAL or chromogenic endotoxin assay.

    12.2 EU/vial (limit: 40 EU/vial)

  • Sterility

    Not on this COA

    Sterility testing where applicable.

    No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.

  • Residual solvent / water

    Not on this COA

    Residual solvents or water content limits.

    No evidence for this panel. That lowers thoroughness — whether it matters depends on what you care about.

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

Not on this certificate. Lowers thoroughness; you decide if that panel matters for your use case. PeptIQ’s score still factors coverage.

Findings

Evidence-linked observations from this audit.

  • High HPLC purity confirmed

    99.7% purity by HPLC (USP <621>), exceeding ≥98% specification. This is normal for research-grade peptides.

  • Identity confirmed by FTIR and HPLC

    FTIR spectrum confirms GHK-Cu presence with excipients/fillers. HPLC chromatogram shows single dominant peak at 1.591 min retention time.

  • Batch/lot number clearly stated

    Lot CR-GCU100-2603-1, BT Sample ID 005000039491489 (main COA) and 005000039491603 (endotoxin test)

  • Dates are consistent and valid

    Date tested: 2026-04-02, Issue date: 2026-04-05 (main COA); Endotoxin tested: 2026-04-08, issued: 2026-04-10. All dates are on or before 2026-07-28 and logically sequenced.

  • Testing lab identified with contact details

    BTLabs, 5730 Corporate Way Suite 220, West Palm Beach, FL 33407. Phone: (561) 625-0133. Website: https://btlabtesting.com. Two scientists signed (Andrea Castro, AS and Verna Zheng, AS).

  • Endotoxin testing performed separately

    Bacterial endotoxin test (USP <85>) performed on separate page (Report IF-824-QSA-TR006-BTL26130-28), result 12.2 EU/vial, passing 40 EU/vial limit.

  • Potency results show variability across samples

    Three potency measurements: 112.9%, 68.3%, 72.3% of labeled 100 mg. Only one meets the 90-110% specification. This suggests sample heterogeneity or multiple vials tested.

  • Heavy metals, microbial, sterility, and residual solvent/water testing not performed

    COA explicitly states it does not provide information on particulate matter, microbial contamination, or endotoxins (though endotoxin was later tested separately). No heavy metals, sterility, or residual solvent/water data.

  • Professional formatting with QR code and watermarks

    Document includes BTLabs logo, QR code, watermarks, report numbers, revision date (Rev 1.0 January 2025), and visual sample description with photo.

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.