Independent side-by-side comparison of Hangzhou Qihang Xingcheng and LA Peptides — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Hangzhou Qihang Xingcheng has more published third-party tests (2 vs 0); LA Peptides carries more community reviews (210).
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.
Hangzhou Qihang Xingcheng: 2 independent Janoshik assays, across 2 substances, median measured purity 99.8%, most recent 2026-04-13. LA Peptides has no independent Janoshik assays on file.
| Attribute | Hangzhou Qihang Xingcheng | LA Peptides |
|---|---|---|
| Third-party tests | 2 tests, avg purity 99.8% | None published |
| Community rating | No reviews | 4/5 (210 reviews) |
| COA available | No | Yes |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Year established | Unknown | 2020 |
| Substance | Hangzhou Qihang Xingcheng | LA Peptides |
|---|---|---|
| Tirzepatide 20mg(TR20) | 99.64% (1 assay, latest 2026-04-13) | Not tested |
| Tirzepatide 60mg(TR60) | 99.90% (1 assay, latest 2026-02-19) | Not tested |
| Checked | Hangzhou Qihang Xingcheng | LA Peptides |
|---|---|---|
| Certificates of analysis | Not stated | None found on the site |
| Products listed | Not stated | 75 |
| Public pricing | Not stated | Listed on the site |
| Payment methods | Not stated | Credit Card |
| Ships to | Not stated | United States, Worldwide |
| Research-use-only notice | Not stated | Published |
Hangzhou Qihang Xingcheng. Hangzhou Qihang Xingcheng: 2 independent Janoshik assays, across 2 substances, median measured purity 99.8%, most recent 2026-04-13. LA Peptides 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 Hangzhou Qihang Xingcheng's site, and we found no certificates of analysis anywhere on LA Peptides' site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Hangzhou Qihang Xingcheng does not state a shipping region, and LA Peptides states it ships to United States, Worldwide. Both are read from the vendors' own sites.
Full profiles: Hangzhou Qihang Xingcheng, LA Peptides.
Full lab-test records: All 2 Hangzhou Qihang Xingcheng lab tests.
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