Independent side-by-side comparison of Apex Peptides and Hangzhou Qihang Xingcheng — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Hangzhou Qihang Xingcheng shows higher average tested purity (99.8% vs 99.2%).
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. Hangzhou Qihang Xingcheng: 2 independent Janoshik assays, across 2 substances, median measured purity 99.8%, most recent 2026-04-13.
| Attribute | Apex Peptides | Hangzhou Qihang Xingcheng |
|---|---|---|
| Third-party tests | 2 tests, avg purity 99.2% | 2 tests, avg purity 99.8% |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Apex Peptides | Hangzhou Qihang Xingcheng |
|---|---|---|
| Retatrutide 40mg | 99.28% (1 assay, latest 2026-02-04) | Not tested |
| Retatrutide 20mg | 99.07% (1 assay, latest 2026-02-04) | Not tested |
| Tirzepatide 20mg(TR20) | Not tested | 99.64% (1 assay, latest 2026-04-13) |
| Tirzepatide 60mg(TR60) | Not tested | 99.90% (1 assay, latest 2026-02-19) |
| Checked | Apex Peptides | Hangzhou Qihang Xingcheng |
|---|---|---|
| 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 |
Neither — both have 2 on file. Apex Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.2%, most recent 2026-02-04. Hangzhou Qihang Xingcheng: 2 independent Janoshik assays, across 2 substances, median measured purity 99.8%, most recent 2026-04-13.
We found no certificates of analysis anywhere on Apex Peptides' site, and we have not read Hangzhou Qihang Xingcheng's 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 Hangzhou Qihang Xingcheng does not state one. Both are read from the vendors' own sites.
Full profiles: Apex Peptides, Hangzhou Qihang Xingcheng.
Full lab-test records: All 2 Apex Peptides lab tests, All 2 Hangzhou Qihang Xingcheng lab tests.
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