Batch # sr-cu100-260720-002GHK-Cu 100mg

100mg Active

Independent lab report COA-2026-LUYZFM (analyzed 08/11/2026): 99.45% HPLC purity, 105.17 mg net peptide content, identity confirmed, heavy metals not detected, sterility screen no growth, endotoxin 0.089 EU/mL, fentanyl not detected.

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Independent lab report

Commissioned by Source Research from an independent lab, separate from the supplier. Values below are copied from the report as printed.

Testing lab: ILS Laboratories
COA #: COA-2026-LUYZFM
Batch #: sr-cu100-260720-002
Analysis date: 08/11/2026
Date received: 07/22/2026
Labeled content (as submitted): 100mg
Method: Full QC Panel
Appearance: Good
Vials tested: 1 of 20
Fentanyl: Not Detected (immunoassay, 50 ng/mL cutoff)
Overall result (as printed): PASS

Full QC panel
Analyte	Specification	Result	Status
Peptide Purity (HPLC)	>= 95.0%	99.45%	PASS
Net Peptide Content	Report Only	105.17 mg	N/A
Identity (HPLC-RTM)	GHK-Cu	Confirmed	PASS
Fentanyl Screen	Immunoassay, 50 ng/mL cutoff	Not Detected	PASS

Heavy metals (ICP-MS)
Test	Specification	Result	Status
Arsenic (As)	NMT 1.5 ppm	Not Detected	PASS
Cadmium (Cd)	NMT 0.5 ppm	Not Detected	PASS
Lead (Pb)	NMT 1.0 ppm	Not Detected	PASS
Mercury (Hg)	NMT 1.5 ppm	Not Detected	PASS
Chromium (Cr)	NMT 10.0 ppm	Not Detected	PASS

Sterility (PCR)
Test	Specification	Result	Status
Sterility (PCR)	No Growth	No Growth	PASS

Endotoxin (USP <85>)
Test	Specification	Result	Status
Endotoxin (USP <85>)	Report Result	0.089 EU/mL	Reported

Methods, as stated in the report

Identity confirmed by HPLC: chromatographic retention time comparison with a reference standard.
Peptide purity determined by RP-HPLC area normalization at 214 nm (target peptide relative to all peptide-related peaks).
Elemental impurities analyzed by ICP-MS per USP <233> methodology. Acceptance criteria are internal laboratory quality screening limits for research-use materials.
Endotoxin tested per USP <85> kinetic turbidimetric method. Reported as a quantitative value; the report states no universal pass/fail threshold applies to research-use products.

Report links: Verify page · PDF

Supplier COA

The supplier’s own certificate of analysis for this material, issued by the supplier’s laboratory and not commissioned by Source Research. Supplier lot identifiers can differ from Source Research lot numbers, and its test panel differs from the independent lab panel above.

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All GHK-Cu 100mg lots · All testing records

For laboratory research use only. Results relate only to the sample tested.