Independent side-by-side comparison of Certified Peptides and Qingfuji Trading — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Certified Peptides has more published third-party tests (4 vs 0).
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.
Certified Peptides: 4 independent Janoshik assays, across 4 substances, median measured purity 99.7%, most recent 2026-04-01. Qingfuji Trading has no independent Janoshik assays on file.
| Attribute | Certified Peptides | Qingfuji Trading |
|---|---|---|
| Third-party tests | 4 tests, avg purity 99.3% | None published |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Certified Peptides | Qingfuji Trading |
|---|---|---|
| Retatrutide 5mg | 99.70% (1 assay, latest 2026-04-01) | Not tested |
| Selank 10mg | 99.79% (1 assay, latest 2026-03-31) | Not tested |
| Epitalon 50mg | 98.00% (1 assay, latest 2026-03-31) | Not tested |
| Lpamorelin 10mg | 99.77% (1 assay, latest 2026-03-31) | Not tested |
| Checked | Certified Peptides | Qingfuji Trading |
|---|---|---|
| Certificates of analysis | Not stated | 15 published on the site |
| Products listed | Not stated | 63 |
| Payment methods | Not stated | Cryptocurrency, Bank Transfer, PayPal |
| Ships to | Not stated | United States, Worldwide |
| Carriers | Not stated | DHL, FedEx, EMS |
| Research-use-only notice | Not stated | Published |
| Stated origin | Not stated | Hong Kong |
Certified Peptides. Certified Peptides: 4 independent Janoshik assays, across 4 substances, median measured purity 99.7%, most recent 2026-04-01. Qingfuji Trading has no independent Janoshik assays on file. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
We have not read Certified Peptides' site, and Qingfuji Trading publishes 15 certificates of analysis on its own site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Certified Peptides does not state a shipping region, and Qingfuji Trading states it ships to United States, Worldwide. Both are read from the vendors' own sites.
Full profiles: Certified Peptides, Qingfuji Trading.
Full lab-test records: All 4 Certified Peptides lab tests.
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