Independent side-by-side comparison of Arctic Peptide and Limitless Life Nootropics — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Limitless Life Nootropics holds the stronger independent lab grade (ungraded vs C); Arctic Peptide has more published third-party tests (1 vs 0); Limitless Life Nootropics carries more community reviews (410).
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. Limitless Life Nootropics has no independent Janoshik assays on file.
| Attribute | Arctic Peptide | Limitless Life Nootropics |
|---|---|---|
| Independent lab grade | Not graded | C |
| Third-party tests | 1 test, avg purity 99.6% | None published |
| Community rating | 4.2/5 (310 reviews) | 4.3/5 (410 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 | 2019 |
| Substance | Arctic Peptide | Limitless Life Nootropics |
|---|---|---|
| Retatrutide 10 Mg | 99.61% (1 assay, latest 2026-02-26) | Not tested |
| Checked | Arctic Peptide | Limitless Life Nootropics |
|---|---|---|
| Certificates of analysis | Not stated | None found on the site |
| Products listed | Not stated | 24 |
| Payment methods | Not stated | Credit Card |
| Ships to | Not stated | United States, Worldwide |
| Carriers | Not stated | FedEx, USPS |
| Research-use-only notice | Not stated | Published |
| Stated origin | Not stated | United States |
Arctic Peptide. Arctic Peptide: 1 independent Janoshik assay, median measured purity 99.6%, most recent 2026-02-26. Limitless Life Nootropics has no independent Janoshik assays on file. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
Arctic Peptide states that COAs are available, and we found no certificates of analysis anywhere on Limitless Life Nootropics' 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 Limitless Life Nootropics states it ships to United States, Worldwide. Both are read from the vendors' own sites.
Full profiles: Arctic Peptide, Limitless Life Nootropics.
Full lab-test records: All 1 Arctic Peptide lab test.
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