Independent side-by-side comparison of Penguin Peptides and Ro — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Penguin Peptides has more published third-party tests (18 vs 0); Ro carries more community reviews (15200).
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.
Penguin Peptides: 18 independent Janoshik assays, across 17 substances, median measured purity 99.8%, most recent 2026-01-22. Ro has no independent Janoshik assays on file.
| Attribute | Penguin Peptides | Ro |
|---|---|---|
| Third-party tests | 18 tests, avg purity 99.2% | None published |
| Community rating | No reviews | 4.6/5 (15200 reviews) |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | Not specified | United States |
| Year established | Unknown | 2017 |
| Substance | Penguin Peptides | Ro |
|---|---|---|
| GLOW 70mg | purity not reported (2 assays, latest 2026-01-21) | Not tested |
| HGH 191AA 36iu | 96.33% (1 assay, latest 2026-01-22) | Not tested |
| Glp-1 T 120mg | 99.88% (1 assay, latest 2026-01-21) | Not tested |
| Glp-1 T 60mg | 99.86% (1 assay, latest 2026-01-21) | Not tested |
| Glp-3 R 30mg | 99.88% (1 assay, latest 2026-01-21) | Not tested |
| KLOW 80mg | purity not reported (1 assay, latest 2026-01-21) | Not tested |
| Mots-c 40mg | 99.54% (1 assay, latest 2026-01-21) | Not tested |
| BACTERIOSTATIC WATER 10ml | purity not reported (1 assay, latest 2026-01-21) | Not tested |
| Bpc-157 10mg + TB 500 10mg | purity not reported (1 assay, latest 2026-01-21) | Not tested |
| Ghk-cu 50mg | 99.97% (1 assay, latest 2025-08-25) | Not tested |
| Epithalon 10mg | 99.76% (1 assay, latest 2025-08-21) | Not tested |
| CJC 1295 5MG + IPAMORELIN 5MG | purity not reported (1 assay, latest 2025-07-28) | Not tested |
Penguin Peptides. Penguin Peptides: 18 independent Janoshik assays, across 17 substances, median measured purity 99.8%, most recent 2026-01-22. Ro has no independent Janoshik assays on file. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
Full profiles: Penguin Peptides, Ro.
Full lab-test records: All 18 Penguin Peptides lab tests.
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