Nantong Guangyuan Chemical GYC
Retatrutide
Finnrick tested 16 samples of Retatrutide (GLP-1, GIP, and GCGR agonist) from Nantong Guangyuan Chemical GYC between 5 Oct 2025 and 16 Feb 2026. Fraud: Based on community reports, we have identified ggpeps.net as a fraudulent web site aggressively operating in the name of this vendor. It is most likely entirely unaffiliated with the original company, the fraud is putting the public at risk, so we are temporarily putting all tests under review.
Take Action
Request Full Data Access to the Finnrick database of peptide tests.
Free peptide testing
Mail in a sample (US only) to get confidence for the specific vials you have, and contribute to identifying unsafe supply chains, so other people can avoid risky and costly mistakes.
Other Retatrutide tests from top-rated vendors:
All Retatrutide tests from Nantong Guangyuan Chemical GYC
Samples are tested in commercial labs
Tests Count
Scores
Last
First
| Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Batch | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 16 Feb 2026⚠️ | View | 10mg | 10.4mg | 10mg | -4.0% | 99.90% | n/a | 1210 (2025121210) | White Label / Silver Crimp / White Cap | Lab E | Public | |
| 11 Feb 2026⚠️ | View | 60mg | 69.5mg | 66mg | -5.0% | 99.88% | n/a | 2025091260 | No Label / Silver Crimp / Clear Blue Cap | Lab E | Public | |
| 4 Feb 2026⚠️ | View | 50mg | 56.0mg | 51.2mg | -8.5% | 99.80% | n/a | 2025111060 | No Label / Green Crimp / Clear Cap | Lab G | Public | |
| 26 Jan 2026⚠️ | View | 20mg | 21.7mg | 20.3mg | -6.3% | 99.90% | below LOQ | 2025101220 | No Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 26 Jan 2026⚠️ | View | 15mg | (no batch claim) | 15.2mg | +1.3% | 99.70% | n/a | (no batch ID) | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 26 Jan 2026⚠️ | View | 15mg | (no batch claim) | 15.5mg | +3.3% | 99.90% | n/a | (no batch ID) | No Label / Red Crimp / Clear Cap | Lab E | Public | |
| 26 Jan 2026⚠️ | View | 10mg | (no batch claim) | 10.7mg | +7.0% | 99.80% | n/a | (no batch ID) | No Label / Silver Crimp / Clear Blue Cap | Lab G | Public | |
| 26 Jan 2026⚠️ | View | 10mg | (no batch claim) | 9.9mg | -1.0% | 99.70% | n/a | 2025121210 | No Label / Silver Crimp / White Cap | Lab G | Public | |
| 15 Jan 2026⚠️ | View | 20mg | (no batch claim) | 21.7mg | +8.5% | 99.90% | n/a | 2025101220 | White Label / Silver Crimp / Blue Cap | Lab G | Public | |
| 15 Jan 2026⚠️ | View | 30mg | (no batch claim) | 30.4mg | +1.3% | 99.80% | n/a | 202501230 | White Label / Silver Crimp / Violet Cap | Lab G | Public | |
| 23 Nov 2025⚠️ | View | 30mg | 34.0mg | 33mg | -2.8% | 99.90% | n/a | 2025101230 | No Label / Silver Crimp / Violet Cap | Lab G | Public | |
| 4 Nov 2025⚠️ | View | 50mg | (no batch claim) | 46.7mg | -6.6% | 99.87% | n/a | G20250750 | White Label / Green Crimp / Clear Cap | Lab E | Public | |
| 3 Nov 2025⚠️ | View | 50mg | 52.8mg | 30.19mg | -42.8% | 99.90% | n/a | G20250750 | No Label / Green Crimp / Clear Cap | Lab G | Public | |
| 30 Oct 2025⚠️ | View | 15mg | 19.9mg | 15.8mg | -20.4% | 99.80% | n/a | 20250815 | No Label / Silver Crimp / Black Cap | Lab G | Public | |
| 29 Oct 2025⚠️ | View | 15mg | 19.9mg | 14.6mg | -26.5% | 99.95% | n/a | 20250815 | No Label / Silver Crimp / Black Cap | Lab E | Public | |
| 5 Oct 2025⚠️ | View | 50mg | 52.8mg | 46.9mg | -11.1% | 99.77% | n/a | G20250750 | White Label / Green Crimp / Clear Cap | Lab E | Public | |
Corrections
- 26 Mar 2026
- Following community reports, we have identified clear signals of large-scale fraud in the name of Nantong Guangyuan Chemical GYC and are retracting all of their tests. The presence on the site ggpeps.net of an obviously fraudulent copy of the Finnrick web site (PeptideMeter.com) shows intent to deceive. Community reports include products not shipped after payment is taken. Finnrick strongly advises against purchasing from this vendor.