Independent side-by-side comparison of Qingfuji Trading and Zztai Peptide — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Zztai Peptide holds the stronger independent lab grade (ungraded vs C); Zztai Peptide has more published third-party tests (18 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.
Qingfuji Trading has no independent Janoshik assays on file. Zztai Peptide: 18 independent Janoshik assays, across 17 substances, median measured purity 99.5%, most recent 2025-12-19.
| Attribute | Qingfuji Trading | Zztai Peptide |
|---|---|---|
| Independent lab grade | Not graded | C |
| Third-party tests | None published | 18 tests, avg purity 99.3% |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Qingfuji Trading | Zztai Peptide |
|---|---|---|
| Retatrutide 20mg | Not tested | 99.55% (2 assays, latest 2025-12-18) |
| DSIP 5mg | Not tested | 99.01% (1 assay, latest 2025-12-19) |
| Tirzepatide 60mg | Not tested | 99.95% (1 assay, latest 2025-12-18) |
| HGH 191AA (somatropin) 151U | Not tested | 97.83% (1 assay, latest 2025-12-18) |
| Mots-c 10mg | Not tested | 99.10% (1 assay, latest 2025-10-21) |
| Retatrutide 30mg | Not tested | 99.62% (1 assay, latest 2025-10-21) |
| Retatrutide 5mg | Not tested | 99.24% (1 assay, latest 2025-10-21) |
| Retatrutide 15mg | Not tested | 99.41% (1 assay, latest 2025-10-21) |
| Retatrutide 50mg | Not tested | 99.69% (1 assay, latest 2025-10-21) |
| HGH 191AA(Somatropin 10IU | Not tested | 97.50% (1 assay, latest 2025-10-20) |
| GLOW 70mg | Not tested | purity not reported (1 assay, latest 2025-10-16) |
| Semax 10mg | Not tested | 99.40% (1 assay, latest 2025-07-04) |
| Checked | Qingfuji Trading | Zztai Peptide |
|---|---|---|
| Certificates of analysis | 15 published on the site | None found on the site |
| Products listed | 63 | 62 |
| Public pricing | Not stated | Listed on the site |
| Payment methods | Cryptocurrency, Bank Transfer, PayPal | Credit Card, PayPal |
| Ships to | United States, Worldwide | United States, United Kingdom, Canada, Australia, New Zealand |
| Carriers | DHL, FedEx, EMS | DHL, FedEx, UPS, USPS |
| Research-use-only notice | Published | Not stated |
| Stated origin | Hong Kong | Hong Kong |
Zztai Peptide. Qingfuji Trading has no independent Janoshik assays on file. Zztai Peptide: 18 independent Janoshik assays, across 17 substances, median measured purity 99.5%, most recent 2025-12-19. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
Qingfuji Trading publishes 15 certificates of analysis on its own site, and we found no certificates of analysis anywhere on Zztai Peptide's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Qingfuji Trading states it ships to United States, Worldwide, and Zztai Peptide states it ships to United States, United Kingdom, Canada, Australia, New Zealand. Both are read from the vendors' own sites.
Full profiles: Qingfuji Trading, Zztai Peptide.
Full lab-test records: All 18 Zztai Peptide lab tests.
Related comparisons: Qingfuji Trading vs Certified Peptides, Zztai Peptide vs Certified Peptides, Qingfuji Trading vs Henan Sahe Peptide, Zztai Peptide vs HK Peptides, Qingfuji Trading vs Qing Li Peptide, Zztai Peptide vs Scantifix.