Independent side-by-side comparison of Purity Peptides and YH Peptide — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: YH Peptide has more published third-party tests (3 vs 0); Purity 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.
Purity Peptides has no independent Janoshik assays on file. YH Peptide: 3 independent Janoshik assays, across 3 substances, median measured purity 99.8%, most recent 2026-03-26.
| Attribute | Purity Peptides | YH Peptide |
|---|---|---|
| Third-party tests | None published | 3 tests, avg purity 99.7% |
| Community rating | 4.5/5 (210 reviews) | No reviews |
| COA available | Yes | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | North America | Not specified |
| Year established | 2022 | Unknown |
| Substance | Purity Peptides | YH Peptide |
|---|---|---|
| Ghk-cu 50mg(CU50) | Not tested | 99.53% (1 assay, latest 2026-03-26) |
| Retatrutide 30mg(RT30) | Not tested | 99.81% (1 assay, latest 2026-02-19) |
| Tirzepatide 60mg(TR60) | Not tested | 99.90% (1 assay, latest 2026-02-19) |
| Checked | Purity Peptides | YH Peptide |
|---|---|---|
| Certificates of analysis | 54 published on the site | Not stated |
| Ships to | United States, Canada, Worldwide | Not stated |
| Research-use-only notice | Published | Not stated |
YH Peptide. Purity Peptides has no independent Janoshik assays on file. YH Peptide: 3 independent Janoshik assays, across 3 substances, median measured purity 99.8%, most recent 2026-03-26. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
Purity Peptides publishes 54 certificates of analysis on its own site, and we have not read YH Peptide's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Purity Peptides states it ships to United States, Canada, Worldwide, and YH Peptide does not state one. Both are read from the vendors' own sites.
Full profiles: Purity Peptides, YH Peptide.
Full lab-test records: All 3 YH Peptide lab tests.
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