Independent side-by-side comparison of Peptide Gurus and UGL OZ — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Peptide Gurus holds the stronger independent lab grade (D vs ungraded); Peptide Gurus has more published third-party tests (63 vs 5).
Every figure below is either measured by an independent laboratory or read from the vendor's own website, and the source is named against it. PeptideAtlas is not affiliated with either vendor.
Peptide Gurus: 63 independent Janoshik assays, across 58 substances, median measured purity 99.7%, most recent 2026-04-24. UGL OZ: 5 independent Janoshik assays, across 5 substances, most recent 2023-11-14.
| Attribute | Peptide Gurus | UGL OZ |
|---|---|---|
| Independent lab grade | D | Not graded |
| Third-party tests | 63 tests, avg purity 99.5% | 5 tests |
| COA available | No | Yes |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Peptide Gurus | UGL OZ |
|---|---|---|
| Retatrutide 10mg | 99.51% (3 assays, latest 2026-04-14) | Not tested |
| Tirzepatide 30mg | 99.84% (3 assays, latest 2026-04-14) | Not tested |
| Tirzepatide 10mg | 99.79% (2 assays, latest 2026-04-14) | Not tested |
| Ss-31 40mg | 99.73% (1 assay, latest 2026-04-24) | Not tested |
| Wolverine(bpc-157 5mg Blend With Tb-500 5mg) | purity not reported (1 assay, latest 2026-04-23) | Not tested |
| Wolverine(bpc-157 10mg Blend With Tb-500 10mg) | purity not reported (1 assay, latest 2026-04-23) | Not tested |
| Pinealon 20mg | 99.17% (1 assay, latest 2026-04-14) | Not tested |
| Oxytocin 10mg | 97.53% (1 assay, latest 2026-04-14) | Not tested |
| Hcg 10,000 IU | purity not reported (1 assay, latest 2026-04-14) | Not tested |
| Pt-141 10mg | 99.90% (1 assay, latest 2026-04-14) | Not tested |
| Tesamorelin 10mg | 99.74% (1 assay, latest 2026-04-14) | Not tested |
| Retatrutide 5mg | 99.78% (1 assay, latest 2026-04-14) | Not tested |
Peptide Gurus. Peptide Gurus: 63 independent Janoshik assays, across 58 substances, median measured purity 99.7%, most recent 2026-04-24. UGL OZ: 5 independent Janoshik assays, across 5 substances, most recent 2023-11-14. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
Full profiles: Peptide Gurus, UGL OZ.
Full lab-test records: All 63 Peptide Gurus lab tests, All 5 UGL OZ lab tests.
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