Independent side-by-side comparison of Optimum Formula and Peptides 4 Research — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Peptides 4 Research holds the stronger independent lab grade (ungraded vs D); Peptides 4 Research has more published third-party tests (2 vs 0); Optimum Formula carries more community reviews (160).
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.
Optimum Formula has no independent Janoshik assays on file. Peptides 4 Research: 2 independent Janoshik assays, across 2 substances, median measured purity 99.5%, most recent 2025-12-29.
| Attribute | Optimum Formula | Peptides 4 Research |
|---|---|---|
| Independent lab grade | Not graded | D |
| Third-party tests | None published | 2 tests, avg purity 99.5% |
| Community rating | 4.1/5 (160 reviews) | No reviews |
| COA available | Yes | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Year established | 2021 | Unknown |
| Substance | Optimum Formula | Peptides 4 Research |
|---|---|---|
| Cjc-1295 NO DAC 10MG | Not tested | 99.27% (1 assay, latest 2025-12-29) |
| Retatrutide 10mg | Not tested | 99.70% (1 assay, latest 2025-10-31) |
Peptides 4 Research. Optimum Formula has no independent Janoshik assays on file. Peptides 4 Research: 2 independent Janoshik assays, across 2 substances, median measured purity 99.5%, most recent 2025-12-29. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
Full profiles: Optimum Formula, Peptides 4 Research.
Full lab-test records: All 2 Peptides 4 Research lab tests.
Related comparisons: Peptides 4 Research vs BioTech Peptides, Peptides 4 Research vs Healthletic, Peptides 4 Research vs HK Peptides, Peptides 4 Research vs LimitlessBioChem, Peptides 4 Research vs OmegAmino, Peptides 4 Research vs Onlythebestaas.