Independent side-by-side comparison of Arctic Peptide and LimitlessBioChem — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Arctic Peptide carries more community reviews (310).
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.
Arctic Peptide: 1 independent Janoshik assay, median measured purity 99.6%, most recent 2026-02-26. LimitlessBioChem: 1 independent Janoshik assay, most recent 2026-02-13.
| Attribute | Arctic Peptide | LimitlessBioChem |
|---|---|---|
| Third-party tests | 1 test, avg purity 99.6% | 1 test |
| Community rating | 4.2/5 (310 reviews) | 4.1/5 (190 reviews) |
| COA available | Yes | Yes |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | Norway | Not specified |
| Year established | 2021 | 2020 |
| Substance | Arctic Peptide | LimitlessBioChem |
|---|---|---|
| Retatrutide 10 Mg | 99.61% (1 assay, latest 2026-02-26) | Not tested |
| Nad+ 400 Mg | Not tested | purity not reported (1 assay, latest 2026-02-13) |
| Checked | Arctic Peptide | LimitlessBioChem |
|---|---|---|
| Certificates of analysis | Not stated | None found on the site |
| Products listed | Not stated | 105 |
| Public pricing | Not stated | Listed on the site |
| Payment methods | Not stated | Bank Transfer, Credit Card |
| Ships to | Not stated | United States, United Kingdom, Europe, Australia, New Zealand, Worldwide |
| Research-use-only notice | Not stated | Published |
| Stated origin | Not stated | Hong Kong |
Neither — both have 1 on file. Arctic Peptide: 1 independent Janoshik assay, median measured purity 99.6%, most recent 2026-02-26. LimitlessBioChem: 1 independent Janoshik assay, most recent 2026-02-13.
Arctic Peptide states that COAs are available, and we found no certificates of analysis anywhere on LimitlessBioChem's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Arctic Peptide does not state a shipping region, and LimitlessBioChem states it ships to United States, United Kingdom, Europe, Australia, New Zealand, Worldwide. Both are read from the vendors' own sites.
Full profiles: Arctic Peptide, LimitlessBioChem.
Full lab-test records: All 1 Arctic Peptide lab test, All 1 LimitlessBioChem lab test.
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