Finnrick, an independent testing programme, publishes 46 assays for Nantong Guangyuan Chemical GYC: 43 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 3 did not. Most recent assay 17 Jul 2026.
Nantong Guangyuan Chemical GYC listed by Finnrick as "active", has no storefront on record — Finnrick lists only a messaging or social contact. Source: Finnrick, https://www.finnrick.com/vendors/nantong-guangyuan-chemical-gyc.
Finnrick-tested with failing results. Tested across 2 peptide products with 41 total samples.
Nantong Guangyuan Chemical GYC is listed as active. Finnrick Grade F. Finnrick avg score: 7.7/10 across 41 samples (2 products). Failing quality. Not recommended.
Nantong Guangyuan Chemical GYC holds independent lab grade F, assigned across 41 graded samples, average score 7.7/10. That grade comes from an independent grader's own sampling, not from PeptideAtlas, and it describes the samples that grader obtained rather than every batch sold.
| Product | Assays | Result |
|---|---|---|
| Tirzepatide | 23 | 21 passed, 2 failed |
| Retatrutide | 19 | 18 passed, 1 failed |
| Cagrilintide | 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 |
|---|---|
| Independent lab grade | F (41 samples) |
| Average grader score | 7.7/10 |
| Vendor type | Research-use supplier |
| Satisfaction | 0.5/5 |
|---|---|
| Delivery | 5/5 |
| Customer service | 5/5 |
| Packaging | 4/5 |
| Ease of purchase | 5/5 |
| Payment | 4/5 |
Scored out of 5 by the same independent grader, from its own buyers rather than from this site.
These details were read from Nantong Guangyuan Chemical GYC's own website on 2026-08-10. Pages consulted:
Nantong Guangyuan Chemical GYC is listed as active and we hold 46 Finnrick assays (43 passing, 3 failing its purity threshold); an independent lab grade of F. 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 46 assays for Nantong Guangyuan Chemical GYC: 43 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 3 did not. Most recent assay 17 Jul 2026.
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