Finnrick, an independent testing programme, publishes 8 assays for YuYi peptide: 5 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 2 did not. Most recent assay 16 Jun 2026.
YuYi peptide operates from China, listed by Finnrick as "Trading", has no storefront on record — Finnrick lists only a messaging or social contact. Source: Finnrick, https://www.finnrick.com/vendors/yuyi-peptide.
YuYi peptide is listed as active.
No independent third-party assay is on file for YuYi peptide, 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 | 3 passed, 1 failed |
| Tirzepatide | 4 | 2 passed, 1 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 |
YuYi peptide is listed as active and we hold 8 Finnrick assays (5 passing, 2 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 8 assays for YuYi peptide: 5 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 2 did not. Most recent assay 16 Jun 2026.
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