Independent side-by-side comparison of Apex Peptides and Penguin Peptides — 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 2).
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.
Apex Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.2%, most recent 2026-02-04. Penguin Peptides: 18 independent Janoshik assays, across 17 substances, median measured purity 99.8%, most recent 2026-01-22.
| Attribute | Apex Peptides | Penguin Peptides |
|---|---|---|
| Third-party tests | 2 tests, avg purity 99.2% | 18 tests, avg purity 99.2% |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Apex Peptides | Penguin Peptides |
|---|---|---|
| GLOW 70mg | Not tested | purity not reported (2 assays, latest 2026-01-21) |
| Retatrutide 40mg | 99.28% (1 assay, latest 2026-02-04) | Not tested |
| Retatrutide 20mg | 99.07% (1 assay, latest 2026-02-04) | Not tested |
| HGH 191AA 36iu | Not tested | 96.33% (1 assay, latest 2026-01-22) |
| Glp-1 T 120mg | Not tested | 99.88% (1 assay, latest 2026-01-21) |
| Glp-1 T 60mg | Not tested | 99.86% (1 assay, latest 2026-01-21) |
| Glp-3 R 30mg | Not tested | 99.88% (1 assay, latest 2026-01-21) |
| KLOW 80mg | Not tested | purity not reported (1 assay, latest 2026-01-21) |
| Mots-c 40mg | Not tested | 99.54% (1 assay, latest 2026-01-21) |
| BACTERIOSTATIC WATER 10ml | Not tested | purity not reported (1 assay, latest 2026-01-21) |
| Bpc-157 10mg + TB 500 10mg | Not tested | purity not reported (1 assay, latest 2026-01-21) |
| Ghk-cu 50mg | Not tested | 99.97% (1 assay, latest 2025-08-25) |
| Checked | Apex Peptides | Penguin Peptides |
|---|---|---|
| Certificates of analysis | None found on the site | Not stated |
| Products listed | 29 | Not stated |
| Public pricing | Listed on the site | Not stated |
| Ships to | United States | Not stated |
| Research-use-only notice | Published | Not stated |
Penguin Peptides. Apex Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.2%, most recent 2026-02-04. Penguin Peptides: 18 independent Janoshik assays, across 17 substances, median measured purity 99.8%, most recent 2026-01-22. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
We found no certificates of analysis anywhere on Apex Peptides' site, and we have not read Penguin Peptides' site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Apex Peptides states it ships to United States, and Penguin Peptides does not state one. Both are read from the vendors' own sites.
Full profiles: Apex Peptides, Penguin Peptides.
Full lab-test records: All 2 Apex Peptides lab tests, All 18 Penguin Peptides lab tests.
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