Third-party lab testing: 4 independent Janoshik assays on file, covering 4 substances, median measured purity 99.7%, most recent test 2026-04-01.
Finnrick, an independent testing programme, publishes 4 assays for Certified 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 10 Jul 2026.
Certified Peptides operates from US, WA 98579, listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/certified-peptides.
Certified Peptides is listed as active.
Community standing: 3.1/5 on Trustpilot from 15 reviews. Ratings of anonymous sellers of unregulated products are the weakest signal on this page; the assay and grading records carry more.
| Substance | Measured purity | Test date |
|---|---|---|
| Retatrutide 5mg | 99.70% | 2026-04-01 |
| Selank 10mg | 99.79% | 2026-03-31 |
| Epitalon 50mg | 98.00% | 2026-03-31 |
| Lpamorelin 10mg | 99.77% | 2026-03-31 |
| 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 |
|---|---|
| Trustpilot | 3.1/5 from 15 reviews |
| Independent assays on file | 4 |
| Median measured purity | 99.7% |
| Vendor type | Research-use supplier |
Certified 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 Certified Peptides, covering 4 substances, with a median measured purity of 99.7%. The most recent is dated 2026-04-01. Finnrick, an independent testing programme, publishes 4 assays for Certified 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 10 Jul 2026.
Tested substances: Retatrutide 5mg, Selank 10mg, Lpamorelin 10mg.
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