Third-party lab testing: 63 independent Janoshik assays on file, covering 58 substances, median measured purity 99.7%, most recent test 2026-04-24.
Finnrick, an independent testing programme, publishes 46 assays for Peptide Gurus: 9 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 37 did not. Most recent assay 27 Apr 2026.
Peptide Gurus operates from AZ, USA, listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/peptide-gurus.
Finnrick-tested with poor results. Tested across 8 peptide products with 46 total samples.
Peptide Gurus is listed as active with a standing warning against it. Finnrick Grade D. Finnrick avg score: 3.6/10 across 46 samples (8 products). Below-average quality. Exercise caution.
Peptide Gurus holds independent lab grade D, assigned across 46 graded samples, average score 3.6/10. 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.
| Substance | Measured purity | Test date |
|---|---|---|
| Ss-31 40mg | 99.73% | 2026-04-24 |
| Pinealon 20mg | 99.17% | 2026-04-14 |
| Oxytocin 10mg | 97.53% | 2026-04-14 |
| Pt-141 10mg | 99.90% | 2026-04-14 |
| Tesamorelin 10mg | 99.74% | 2026-04-14 |
| Retatrutide 10mg | 99.22% | 2026-04-14 |
| Retatrutide 5mg | 99.78% | 2026-04-14 |
| Tirzepatide 30mg | 99.84% | 2026-04-14 |
| Tirzepatide 10mg | 99.75% | 2026-04-14 |
| Wolverine(bpc-157 5mg Blend With Tb-500 5mg) | not reported | 2026-04-23 |
| Wolverine(bpc-157 10mg Blend With Tb-500 10mg) | not reported | 2026-04-23 |
| Hcg 10,000 IU | not reported | 2026-04-14 |
9 of these 12 assays report a measured purity figure. The other 3 confirm the substance was submitted and tested but carry no purity number on the certificate, which is not the same as a failed result.
All 63 lab tests for Peptide Gurus
| Product | Assays | Result |
|---|---|---|
| BPC-157 | 7 | 0 passed, 7 failed |
| Ipamorelin | 7 | 0 passed, 7 failed |
| Retatrutide | 7 | 0 passed, 7 failed |
| Tirzepatide | 7 | 2 passed, 5 failed |
| CJC-1295 | 6 | 1 passed, 5 failed |
| Semaglutide | 6 | 6 passed, 0 failed |
| Melanotan II | 3 | 0 passed, 3 failed |
| PT-141 | 3 | 0 passed, 3 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 | D (46 samples) |
| Average grader score | 3.6/10 |
| Independent assays on file | 63 |
| Median measured purity | 99.7% |
| Vendor type | Research-use supplier |
| Satisfaction | 0.5/5 |
|---|---|
| Delivery | 5/5 |
| Customer service | 5/5 |
| Packaging | 5/5 |
| Ease of purchase | 5/5 |
| Payment | 5/5 |
Scored out of 5 by the same independent grader, from its own buyers rather than from this site.
These details were read from Peptide Gurus's own website on 2026-08-10. Pages consulted:
Treat Peptide Gurus with caution — it carries an active warning on this directory. Also on record: 63 independent Janoshik assays on file, median measured purity 99.7%; 46 Finnrick assays (9 passing, 37 failing its purity threshold); an independent lab grade of D.
Yes. We hold 63 third-party Janoshik assays for Peptide Gurus, covering 58 substances, with a median measured purity of 99.7%. The most recent is dated 2026-04-24. Finnrick, an independent testing programme, publishes 46 assays for Peptide Gurus: 9 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 37 did not. Most recent assay 27 Apr 2026.
Tested substances: Tesamorelin 10mg, Retatrutide 10mg, Retatrutide 5mg, Tirzepatide 30mg, Tirzepatide 10mg, Mots-c 40mg, Selank 10 Mg, Ghk-cu 50 Mg, Semax 10mg, TIRZEPATIDE 15MG, Tirzepatide 50 Mg, Bpc-157 20mg.
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Popular peptides: Semaglutide, Tirzepatide, Retatrutide, BPC-157, CJC-1295, Ipamorelin.
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