GHK-Cu × growthguys.is — lab test, February 2026
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Test results
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
Label 70 mg · Lab measured 66.9 mg
96% of label, basis not stated — shown as printed. Reconstituted with 2 mL, a 50-unit draw holds 16.7 mg using the measured mass, against 17.5 mg on the label — 4% less.
One vial from this lot was weighed by the laboratory, not yours. This page reports what the certificate says; it does not recommend a dose.
Independent HPLC purity analysis of GHK-Cu from growthguys.is, performed by Janoshik Labs on February 19, 2026. Reported purity: 99.814%. Net content: 66.9 mg against 70 mg labeled (96% of label). Batch GHK06. Sample source: shop-provided. Certificate of analysis attached.
Certificate of analysis
Other lots of GHK-Cu from growthguys.is
| Lot | Tested | Lab | Purity | vs label | Status |
|---|---|---|---|---|---|
| GHK09 | 28 Apr 2026 | Janoshik Labs | 99.005% | 96% | Unverified |
| GHK07 | 30 Mar 2026 | Janoshik Labs | 99.934% | 96% | Unverified |
| GHK05 | 2 Jan 2026 | Janoshik Labs | 99.268% | 100% | Unverified |
| GHK04 | 5 Nov 2025 | Janoshik Labs | 99.565% | 99% | Unverified |
| GHK03 | 7 Aug 2025 | Janoshik Labs | 99.972% | 102% | Unverified |
| GHK01 | 23 May 2025 | Janoshik Labs | 99.894% | 96% | Unverified |
Batches this shop has published a certificate for, newest first. A lot whose printed value cannot identify a batch is not listed.
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