Independent side-by-side comparison of Limitless Life Nootropics and Penguin Peptides — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Limitless Life Nootropics holds the stronger independent lab grade (C vs ungraded); Penguin Peptides has more published third-party tests (18 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.
Limitless Life Nootropics has no independent Janoshik assays on file. Penguin Peptides: 18 independent Janoshik assays, across 17 substances, median measured purity 99.8%, most recent 2026-01-22.
| Attribute | Limitless Life Nootropics | Penguin Peptides |
|---|---|---|
| Independent lab grade | C | Not graded |
| Third-party tests | None published | 18 tests, avg purity 99.2% |
| Community rating | 4.3/5 (410 reviews) | No reviews |
| COA available | Yes | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Year established | 2019 | Unknown |
| Substance | Limitless Life Nootropics | Penguin Peptides |
|---|---|---|
| GLOW 70mg | Not tested | purity not reported (2 assays, latest 2026-01-21) |
| HGH 191AA 36iu | Not tested | 96.33% (1 assay, latest 2026-01-22) |
| Glp-1 T 120mg | Not tested | 99.88% (1 assay, latest 2026-01-21) |
| Glp-1 T 60mg | Not tested | 99.86% (1 assay, latest 2026-01-21) |
| Glp-3 R 30mg | Not tested | 99.88% (1 assay, latest 2026-01-21) |
| KLOW 80mg | Not tested | purity not reported (1 assay, latest 2026-01-21) |
| Mots-c 40mg | Not tested | 99.54% (1 assay, latest 2026-01-21) |
| BACTERIOSTATIC WATER 10ml | Not tested | purity not reported (1 assay, latest 2026-01-21) |
| Bpc-157 10mg + TB 500 10mg | Not tested | purity not reported (1 assay, latest 2026-01-21) |
| Ghk-cu 50mg | Not tested | 99.97% (1 assay, latest 2025-08-25) |
| Epithalon 10mg | Not tested | 99.76% (1 assay, latest 2025-08-21) |
| CJC 1295 5MG + IPAMORELIN 5MG | Not tested | purity not reported (1 assay, latest 2025-07-28) |
| Checked | Limitless Life Nootropics | Penguin Peptides |
|---|---|---|
| Certificates of analysis | None found on the site | Not stated |
| Products listed | 24 | Not stated |
| Payment methods | Credit Card | Not stated |
| Ships to | United States, Worldwide | Not stated |
| Carriers | FedEx, USPS | Not stated |
| Research-use-only notice | Published | Not stated |
| Stated origin | United States | Not stated |
Penguin Peptides. Limitless Life Nootropics has no independent Janoshik assays on file. Penguin Peptides: 18 independent Janoshik assays, across 17 substances, median measured purity 99.8%, most recent 2026-01-22. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
We found no certificates of analysis anywhere on Limitless Life Nootropics' site, and we have not read Penguin Peptides' site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Limitless Life Nootropics states it ships to United States, Worldwide, and Penguin Peptides does not state one. Both are read from the vendors' own sites.
Full profiles: Limitless Life Nootropics, Penguin Peptides.
Full lab-test records: All 18 Penguin Peptides lab tests.
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