Third-party lab testing: 4 independent Janoshik assays on file, covering 4 substances, median measured purity 99.7%, most recent test 2026-03-24.
Finnrick, an independent testing programme, publishes 4 assays for Zhuoyan Peptides: 2 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.
Zhuoyan Peptides listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/zhuoyan-peptides.
Zhuoyan Peptides sells to businesses rather than direct to researchers and operates from China. It lists 20 products.
In its own words: “Zhuoyan Laboratory Peptide Co., Ltd. is a cutting-edge biotechnology company specializing in the research, development, and production of peptide-based pharmaceuticals and cosmetic products. The company leverages advanced synthetic biology and AI-driven technologies to innovate in the field of peptide drug discovery and green manufacturing”
Zhuoyan Peptides names Janoshik Analytical in its copy but publishes no certificates, so there is nothing on the site to check that against.
No prices are published. You have to ask over messaging before you can compare cost against another supplier.
Worth knowing before you order: self-signed TLS certificate, consumer email only, and no research-use-only notice. The site presents a self-signed certificate (issuer: SelfSignedCA / *). Browsers show a full-page security warning before the site loads, and data entered on it, including contact details and any payment information, is not protected by a certificate any browser trusts.
Site check: 20 products listed; operates from China.
Zhuoyan Peptides is listed as active. Tracked by Finnrick. No test data available yet.
| Substance | Measured purity | Test date |
|---|---|---|
| Ss-31 10mg | 99.69% | 2025-06-16 |
| Epitalon 10mg | 99.54% | 2025-06-16 |
| Tirzepatide 10mg | 99.80% | 2025-03-06 |
| Bb10(bpc 5mg + TB 5mg) | not reported | 2026-03-24 |
3 of these 4 assays report a measured purity figure. The other 1 confirm the substance was submitted and tested but carry no purity number on the certificate, which is not the same as a failed result.
| Product | Assays | Result |
|---|---|---|
| Retatrutide | 4 | 2 passed, 2 failed |
Source: Finnrick, as published 2026-08-09. Pass and fail are Finnrick's classification against its own threshold, not ours.
| Status | Active |
|---|---|
| Independent assays on file | 4 |
| Median measured purity | 99.7% |
| Vendor type | Research-use supplier |
These details were read from Zhuoyan Peptides's own website on 2026-08-10. Pages consulted:
Zhuoyan Peptides is listed as active and we hold 4 independent Janoshik assays on file, median measured purity 99.7%; 4 Finnrick assays (2 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. We hold 4 third-party Janoshik assays for Zhuoyan Peptides, covering 4 substances, with a median measured purity of 99.7%. The most recent is dated 2026-03-24. Finnrick, an independent testing programme, publishes 4 assays for Zhuoyan Peptides: 2 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.
Zhuoyan Peptides ships from China.
Tested substances: Tirzepatide 10mg.
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