Independent side-by-side comparison of Maximum Peps and Polar Peptides — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Maximum Peps has more published third-party tests (1 vs 0); Polar Peptides carries more community reviews (340).
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.
Maximum Peps: 1 independent Janoshik assay, median measured purity 99.7%, most recent 2026-01-28. Polar Peptides has no independent Janoshik assays on file.
| Attribute | Maximum Peps | Polar Peptides |
|---|---|---|
| Third-party tests | 1 test, avg purity 99.7% | None published |
| Community rating | No reviews | 4.4/5 (340 reviews) |
| COA available | No | Yes |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | Not specified | Canada |
| Year established | Unknown | 2021 |
| Substance | Maximum Peps | Polar Peptides |
|---|---|---|
| Glp-3rt 20mg | 99.71% (1 assay, latest 2026-01-28) | Not tested |
| Checked | Maximum Peps | Polar Peptides |
|---|---|---|
| Certificates of analysis | None found on the site | Not stated |
| Products listed | 67 | Not stated |
| Public pricing | Listed on the site | Not stated |
| Research-use-only notice | Published | Not stated |
Maximum Peps. Maximum Peps: 1 independent Janoshik assay, median measured purity 99.7%, most recent 2026-01-28. Polar 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 found no certificates of analysis anywhere on Maximum Peps' site, and Polar Peptides states that COAs are available. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Full profiles: Maximum Peps, Polar Peptides.
Full lab-test records: All 1 Maximum Peps lab test.
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