Independent side-by-side comparison of LimitlessBioChem and Peptides 4 Research — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Peptides 4 Research holds the stronger independent lab grade (ungraded vs D); Peptides 4 Research has more published third-party tests (2 vs 1); LimitlessBioChem carries more community reviews (190).
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.
LimitlessBioChem: 1 independent Janoshik assay, most recent 2026-02-13. Peptides 4 Research: 2 independent Janoshik assays, across 2 substances, median measured purity 99.5%, most recent 2025-12-29.
| Attribute | LimitlessBioChem | Peptides 4 Research |
|---|---|---|
| Independent lab grade | Not graded | D |
| Third-party tests | 1 test | 2 tests, avg purity 99.5% |
| Community rating | 4.1/5 (190 reviews) | No reviews |
| COA available | Yes | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Year established | 2020 | Unknown |
| Substance | LimitlessBioChem | Peptides 4 Research |
|---|---|---|
| Nad+ 400 Mg | purity not reported (1 assay, latest 2026-02-13) | Not tested |
| Cjc-1295 NO DAC 10MG | Not tested | 99.27% (1 assay, latest 2025-12-29) |
| Retatrutide 10mg | Not tested | 99.70% (1 assay, latest 2025-10-31) |
| Checked | LimitlessBioChem | Peptides 4 Research |
|---|---|---|
| Certificates of analysis | None found on the site | Not stated |
| Products listed | 105 | Not stated |
| Public pricing | Listed on the site | Not stated |
| Payment methods | Bank Transfer, Credit Card | Not stated |
| Ships to | United States, United Kingdom, Europe, Australia, New Zealand, Worldwide | Not stated |
| Research-use-only notice | Published | Not stated |
| Stated origin | Hong Kong | Not stated |
Peptides 4 Research. LimitlessBioChem: 1 independent Janoshik assay, most recent 2026-02-13. Peptides 4 Research: 2 independent Janoshik assays, across 2 substances, median measured purity 99.5%, most recent 2025-12-29. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
We found no certificates of analysis anywhere on LimitlessBioChem's site, and we have not read Peptides 4 Research's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
LimitlessBioChem states it ships to United States, United Kingdom, Europe, Australia, New Zealand, Worldwide, and Peptides 4 Research does not state one. Both are read from the vendors' own sites.
Full profiles: LimitlessBioChem, Peptides 4 Research.
Full lab-test records: All 1 LimitlessBioChem lab test, All 2 Peptides 4 Research lab tests.
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