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Purity · passBatch · 1668Shop-provided sample

GHK-Cu × Peptidology — Lab Test, February 2026

Tested · submitted by @Frank 👑 Legend
Sample source: shop-provided. The shop chose and sent this vial. Samples bought at retail by a member carry more weight.How we weigh evidence →
HPLC Purity
99.5%
Excellent purity only
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COA on file — not portal-verified

This lab doesn't publish a public lookup, so we can't confirm the certificate against the lab's own record. The document was reviewed before publication, but it rests on our review alone.

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Test results

6 data points
Purity
99.5%
Endotoxins
Not tested
Heavy metals
Not tested
Stated qty
80 mg
Tested qty
58.09 mg
Qty match
73% of labeled · -27%
0label125%
Batch / Lot
1668
Tested by
Vanguard LaboratoryView profile →

This is a purity and identity analysis. Sterility, endotoxins, and heavy metals were not screened — a high purity figure says nothing about those.

About this test

Independent HPLC purity analysis of KLOW from Peptidology, performed by Vanguard Laboratory on February 24, 2026. Reported purity: 99.5%. Net content: 58.09 mg against 80 mg labeled (73% of label). Tested content is 27% below the labeled amount. Batch 1668. Sample source: shop-provided. Certificate of analysis attached.

Certificate of analysis

Original document
HPLC-UV/VIS certificate of analysis for KLOW 50mg/10mg/10mg/10mg blend from Peptidology showing 99.50% purity
Issued by Vanguard Laboratory · Feb 24, 2026 · Batch 1668

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The 669 other GHK-Cu tests on Peptigrity range from 95.76% to 100.00%. This one sits at 99.50%.

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