Independent side-by-side comparison of Apex Peptides and Zhuoyan Peptides — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Zhuoyan Peptides shows higher average tested purity (99.7% vs 99.2%); Zhuoyan Peptides has more published third-party tests (4 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. Zhuoyan Peptides: 4 independent Janoshik assays, across 4 substances, median measured purity 99.7%, most recent 2026-03-24.
| Attribute | Apex Peptides | Zhuoyan Peptides |
|---|---|---|
| Third-party tests | 2 tests, avg purity 99.2% | 4 tests, avg purity 99.7% |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Apex Peptides | Zhuoyan Peptides |
|---|---|---|
| Retatrutide 40mg | 99.28% (1 assay, latest 2026-02-04) | Not tested |
| Retatrutide 20mg | 99.07% (1 assay, latest 2026-02-04) | Not tested |
| Bb10(bpc 5mg + TB 5mg) | Not tested | purity not reported (1 assay, latest 2026-03-24) |
| Ss-31 10mg | Not tested | 99.69% (1 assay, latest 2025-06-16) |
| Epitalon 10mg | Not tested | 99.54% (1 assay, latest 2025-06-16) |
| Tirzepatide 10mg | Not tested | 99.80% (1 assay, latest 2025-03-06) |
| Checked | Apex Peptides | Zhuoyan Peptides |
|---|---|---|
| Certificates of analysis | None found on the site | None found on the site |
| Products listed | 29 | 20 |
| Public pricing | Listed on the site | Not stated |
| Ships to | United States | Worldwide |
| Research-use-only notice | Published | Not stated |
| Stated origin | Not stated | China |
Zhuoyan Peptides. Apex Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.2%, most recent 2026-02-04. Zhuoyan Peptides: 4 independent Janoshik assays, across 4 substances, median measured purity 99.7%, most recent 2026-03-24. 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 found no certificates of analysis anywhere on Zhuoyan 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 Zhuoyan Peptides states it ships to Worldwide. Both are read from the vendors' own sites.
Full profiles: Apex Peptides, Zhuoyan Peptides.
Full lab-test records: All 2 Apex Peptides lab tests, All 4 Zhuoyan Peptides lab tests.
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