Independent side-by-side comparison of Modern Peptides and Polar Peptides — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Modern Peptides has more published third-party tests (25 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.
Modern Peptides: 25 independent Janoshik assays, across 20 substances, median measured purity 99.8%, most recent 2026-02-24. Polar Peptides has no independent Janoshik assays on file.
| Attribute | Modern Peptides | Polar Peptides |
|---|---|---|
| Third-party tests | 25 tests, 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 | Modern Peptides | Polar Peptides |
|---|---|---|
| Retatrutide 20mg | 99.80% (3 assays, latest 2026-02-24) | Not tested |
| Retatrutide 10mg | 99.74% (2 assays, latest 2026-01-26) | Not tested |
| Tirzepatide 15mg | 99.78% (2 assays, latest 2026-01-16) | Not tested |
| Tesamorelin 20mg | 99.75% (2 assays, latest 2026-01-09) | Not tested |
| Retatrutide 50mg | 99.92% (1 assay, latest 2026-02-24) | Not tested |
| KLOW 80 | purity not reported (1 assay, latest 2026-02-23) | Not tested |
| Tirzepatide 30mg | 99.85% (1 assay, latest 2026-01-26) | Not tested |
| Cartalax 20mg | 99.71% (1 assay, latest 2026-01-16) | Not tested |
| Bpc-157 20mg | 99.50% (1 assay, latest 2026-01-16) | Not tested |
| GLOW 70 (bpc-157, Tb500, Ghk-cu) | purity not reported (1 assay, latest 2025-12-15) | Not tested |
| Semaglutide 10mg | 99.69% (1 assay, latest 2025-12-15) | Not tested |
| Bpc-157/tb500 10mg/10mg | purity not reported (1 assay, latest 2025-10-15) | Not tested |
| Checked | Modern Peptides | Polar Peptides |
|---|---|---|
| Certificates of analysis | 1 published on the site | Not stated |
| Products listed | 75 | Not stated |
| Public pricing | Listed on the site | Not stated |
| Payment methods | Cryptocurrency, Bank Transfer, Credit Card | Not stated |
| Ships to | United States, United Kingdom, Canada, Worldwide | Not stated |
| Carriers | FedEx, UPS, USPS, Canada Post | Not stated |
| Research-use-only notice | Published | Not stated |
Modern Peptides. Modern Peptides: 25 independent Janoshik assays, across 20 substances, median measured purity 99.8%, most recent 2026-02-24. 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.
Modern Peptides publishes 1 certificate of analysis on its own 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.
Modern Peptides states it ships to United States, United Kingdom, Canada, Worldwide, and Polar Peptides does not state one. Both are read from the vendors' own sites.
Full profiles: Modern Peptides, Polar Peptides.
Full lab-test records: All 25 Modern Peptides lab tests.
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