Finnrick, an independent testing programme, publishes 26 assays for Coastal Peptides: 11 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 15 did not. Most recent assay 28 Mar 2025.
Coastal Peptides listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/coastal-peptides.
Finnrick-tested with mixed results. Tested across 5 peptide products with 26 total samples.
Coastal Peptides is listed as active with a standing warning against it. Finnrick Grade C. Finnrick avg score: 4.7/10 across 26 samples (5 products). Mixed quality — some products test well, others below average.
Coastal Peptides holds independent lab grade C, assigned across 26 graded samples, average score 4.7/10. 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.
No independent third-party assay is on file for Coastal Peptides, and we have not yet compiled a profile of its own website. An untested vendor has not failed a test — this is an absence of evidence, not evidence against it.
| Product | Assays | Result |
|---|---|---|
| Semaglutide | 6 | 0 passed, 6 failed |
| BPC-157 | 5 | 2 passed, 3 failed |
| CJC-1295 | 5 | 2 passed, 3 failed |
| Retatrutide | 5 | 3 passed, 2 failed |
| Tirzepatide | 5 | 4 passed, 1 failed |
Source: Finnrick, as published 2026-08-09. Pass and fail are Finnrick's classification against its own threshold, not ours.
| Status | Active, with a standing warning |
|---|---|
| Independent lab grade | C (26 samples) |
| Average grader score | 4.7/10 |
| Vendor type | Research-use supplier |
| Satisfaction | 0.4/5 |
|---|---|
| Delivery | 4.7/5 |
| Customer service | 4.3/5 |
| Packaging | 4.6/5 |
| Ease of purchase | 4.6/5 |
| Payment | 4.6/5 |
Scored out of 5 by the same independent grader, from its own buyers rather than from this site.
Treat Coastal Peptides with caution — it carries an active warning on this directory. Also on record: 26 Finnrick assays (11 passing, 15 failing its purity threshold); an independent lab grade of C.
Yes. Finnrick, an independent testing programme, publishes 26 assays for Coastal Peptides: 11 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 15 did not. Most recent assay 28 Mar 2025.
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Popular peptides: Semaglutide, Tirzepatide, Retatrutide, BPC-157, CJC-1295, Ipamorelin.
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