Simple Peptide
Retatrutide
Finnrick tested 12 samples of Retatrutide (GLP-1, GIP, and GCGR agonist) from Simple Peptide between 25 Apr 2025 and 13 Aug 2026. Test scores average below 4 or some scores below 3, and at least 6 tests, warrant a confident Finnrick Rating of E (Bad).
Finnrick Rating™
Simple Peptide
Retatrutide
Tested 12 Samples
Last test 13 Aug 2026
Take Action
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 Simple Peptide
Samples are tested in commercial labs
Tests Count
12
Scores
AVGMINMAX
Last
13 Aug 2026
First
25 Apr 2025
| Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Batch | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 13 Aug 2026 | View | 6mg | (no batch claim) | 7mg | +16.7% | 99.90% | n/a | GR0608062025-J | White label / Silver crimp / Violet cap | Lab E | Public | |
| 14 Jul 2026 | View | 6mg | (no batch claim) | 6.56mg | +9.3% | 99.90% | n/a | GR06-042026-1 | White label / Silver crimp / Violet cap | Lab E | Public | |
| 9 Jul 2026 | View | 15mg | ⚠️ Sample does not contain Retatrutide | n/a | GR24-12222025-j | No label / Silver crimp / Orange cap | Lab G | Public | ||||
| 9 Jul 2026 | View | 10mg | (no batch claim) | 10mg | 99.70% | n/a | 4/5/26 | No label / Silver crimp / White cap | Lab G | Public | ||
| 5 May 2026 | View | 12mg | (no batch claim) | 13mg | +8.3% | 99.90% | n/a | GR12-09222025-J | Orange & White Label / Silver Crimp / Black Cap | Lab E | Public | |
| 28 Apr 2026 | View | 6mg | (no batch claim) | 6.62mg | +10.3% | 99.90% | below LOQ | GR0608062025-J | Orange & White Label / Silver Crimp / Violet Cap | Lab E | Public | |
| 6 Mar 2026 | View | 12mg | 15.6mg | 12mg | -23.0% | 99.90% | n/a | GR-12 12-08-2025 | No Label / Silver Crimp / Red Cap | Lab E | Public | |
| 6 Mar 2026 | View | 10mg | (no batch claim) | 10.5mg | +5.0% | 99.90% | n/a | Jan 8,2026 | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 6 May 2025 | View | 10mg | (no batch claim) | 8.69mg | -13.1% | 99.38% | n/a | 24102807 | Orange & White Label / Silver Crimp / Orange Cap | Lab C | Finnrick | |
| 30 Apr 2025 | View | 10mg | (no batch claim) | 7.97mg | -20.3% | 98.75% | n/a | 24102807 | Orange & White Label / Silver Crimp / Orange Cap | Lab A | Finnrick | |
| 30 Apr 2025 | View | 10mg | (no batch claim) | 7.17mg | -28.3% | 98.83% | n/a | 24102807 | Orange & White Label / Silver Crimp / Orange Cap | Lab A | Finnrick | |
| 25 Apr 2025 | View | 10mg | (no batch claim) | 9.91mg | -0.9% | 98.74% | n/a | 24102807 | Orange & White Label / Silver Crimp / Orange Cap | Lab F | Finnrick | |