Independent side-by-side comparison of Direct Peptides UK and Peptide Sciences — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Peptide Sciences holds the stronger independent lab grade (ungraded vs C); Peptide Sciences carries more community reviews (1247).
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 | Direct Peptides UK | Peptide Sciences |
|---|---|---|
| Independent lab grade | Not graded | C |
| Community rating | 4.3/5 (678 reviews) | 4.7/5 (1247 reviews) |
| COA available | Yes | Yes |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Year established | 2015 | 1990 |
| Checked | Direct Peptides UK | Peptide Sciences |
|---|---|---|
| Certificates of analysis | None found on the site | Not stated |
| Products listed | 32 | Not stated |
| Payment methods | Bank Transfer | Not stated |
| Ships to | United States, Worldwide | Not stated |
| Research-use-only notice | Published | Not stated |
| Stated origin | United States | Not stated |
We found no certificates of analysis anywhere on Direct Peptides UK's site, and Peptide Sciences states that COAs are available. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Direct Peptides UK states it ships to United States, Worldwide, and Peptide Sciences does not state one. Both are read from the vendors' own sites.
Full profiles: Direct Peptides UK, Peptide Sciences.
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