Independent side-by-side comparison of Healthletic and Peptide-S — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Peptide-S holds the stronger independent lab grade (ungraded vs C); Healthletic carries more community reviews (450).
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.
| Attribute | Healthletic | Peptide-S |
|---|---|---|
| Independent lab grade | Not graded | C |
| Community rating | 4.1/5 (450 reviews) | No reviews |
| COA available | Yes | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | United States | Not specified |
| Year established | 2021 | Unknown |
| Checked | Healthletic | Peptide-S |
|---|---|---|
| Certificates of analysis | None found on the site | None found on the site |
| Products listed | 20 | 186 |
| Public pricing | Listed on the site | Listed on the site |
| Ships to | United States, United Kingdom, Europe, Canada, Australia, New Zealand, Worldwide | United States, Worldwide |
| Carriers | Not stated | UPS, USPS |
| Research-use-only notice | Not stated | Published |
| Stated origin | United States | Not stated |
We found no certificates of analysis anywhere on Healthletic's site, and we found no certificates of analysis anywhere on Peptide-S' site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Healthletic states it ships to United States, United Kingdom, Europe, Canada, Australia, New Zealand, Worldwide, and Peptide-S states it ships to United States, Worldwide. Both are read from the vendors' own sites.
Full profiles: Healthletic, Peptide-S.
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