Third-party lab testing: 31 independent Janoshik assays on file, covering 29 substances, median measured purity 99.8%, most recent test 2025-05-16.
Finnrick, an independent testing programme, publishes 41 assays for Peptide Crafters: 27 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 14 did not. Most recent assay 1 Jun 2026.
Peptide Crafters operates from US, listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/peptide-crafters.
Peptide Crafters sells direct to researchers. It lists 76 products, including GHK-Cu, Cagrilintide, Adamax, Testagen, Prostamax, and Cardiogen, plus 32 other compounds.
In its own words: “CHEMICAL SPECIFICATIONS: All reagents are supplied as lyophilized powders (Acetate salts).”
We found no test results or certificates anywhere on Peptide Crafters's site. Of the 12 product pages we opened, every one links its own certificate.
Prices run from $12.99 to $355.00 across 70 listed products. Payment is by credit card.
Worth knowing before you order: no published COAs. We found no certificates of analysis or third-party test results anywhere on the site.
Site check: 76 products listed; payment by credit card.
Peptide Crafters is listed as active. Finnrick Grade C. Finnrick avg score: 6.8/10 across 40 samples (7 products). Mixed quality — some products test well, others below average.
Peptide Crafters holds independent lab grade C, assigned across 40 graded samples, average score 6.8/10. 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.
Community standing: 4.5/5 on Trustpilot from 35 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 |
|---|---|---|
| Glp-2 (t) Tirz | 99.62% | 2025-05-16 |
| Reta - Glp-3 (r) | 99.06% | 2025-03-07 |
| Lpamorelin | 99.78% | 2025-03-07 |
| Ghrp6 | 99.38% | 2025-01-31 |
| Ara-290 | 99.14% | 2025-01-07 |
| Cagrilintide | 99.68% | 2025-01-07 |
| DSIP | 99.84% | 2025-01-07 |
| SEMA | 99.16% | 2024-11-29 |
| EPITALON | 99.95% | 2024-11-27 |
| KPV | 99.81% | 2024-11-27 |
| Ghk-cu | 99.88% | 2024-11-27 |
| Semax | 99.89% | 2024-11-04 |
All 31 lab tests for Peptide Crafters
| Product | Assays | Result |
|---|---|---|
| Semaglutide | 10 | 10 passed, 0 failed |
| Retatrutide | 7 | 5 passed, 2 failed |
| BPC-157 | 6 | 3 passed, 3 failed |
| Tirzepatide | 6 | 4 passed, 2 failed |
| CJC-1295 | 4 | 0 passed, 4 failed |
| Ipamorelin | 4 | 3 passed, 1 failed |
| Melanotan II | 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 |
|---|---|
| Independent lab grade | C (40 samples) |
| Average grader score | 6.8/10 |
| Trustpilot | 4.5/5 from 35 reviews |
| Independent assays on file | 31 |
| Median measured purity | 99.8% |
| Vendor type | Research-use supplier |
| Satisfaction | 0.4/5 |
|---|---|
| Delivery | 3.1/5 |
| Customer service | 4.7/5 |
| Packaging | 4.7/5 |
| Ease of purchase | 4.4/5 |
| Payment | 3.9/5 |
Scored out of 5 by the same independent grader, from its own buyers rather than from this site.
These details were read from Peptide Crafters's own website on 2026-08-10. Pages consulted:
Peptide Crafters is listed as active and we hold 31 independent Janoshik assays on file, median measured purity 99.8%; 41 Finnrick assays (27 passing, 14 failing its purity threshold); an independent lab grade of C. That is evidence about the batches that were tested or published, not a guarantee about the vial you receive.
Yes. We hold 31 third-party Janoshik assays for Peptide Crafters, covering 29 substances, with a median measured purity of 99.8%. The most recent is dated 2025-05-16. Finnrick, an independent testing programme, publishes 41 assays for Peptide Crafters: 27 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 14 did not. Most recent assay 1 Jun 2026.
Peptide Crafters accepts Credit Card.
Tested substances: Ara-290, Cagrilintide, DSIP, EPITALON, Ghk-cu, Semax, Lipo-c, Aod-9604, Selank, TESAMORELIN 10 Mg.
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Popular peptides: Semaglutide, Tirzepatide, Retatrutide, BPC-157, CJC-1295, Ipamorelin.
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