Finnrick, an independent testing programme, publishes 4 assays for Crestpeptide, and all 4 that it grades met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation). Most recent assay 6 Mar 2026.
Crestpeptide operates from china, listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/crestpeptide.
Crestpeptide is listed as active.
No independent third-party assay is on file for Crestpeptide, and we have not yet compiled a profile of its own website. An untested vendor has not failed a test — this is an absence of evidence, not evidence against it.
| Product | Assays | Result |
|---|---|---|
| Retatrutide | 4 | 4 passed, 0 failed |
Source: Finnrick, as published 2026-08-09. Pass and fail are Finnrick's classification against its own threshold, not ours.
| Status | Active |
|---|---|
| Vendor type | Research-use supplier |
Crestpeptide is listed as active and we hold 4 Finnrick assays (4 passing, 0 failing its purity threshold). That is evidence about the batches that were tested or published, not a guarantee about the vial you receive.
Yes. Finnrick, an independent testing programme, publishes 4 assays for Crestpeptide, and all 4 that it grades met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation). Most recent assay 6 Mar 2026.
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