Claims vs COA / Research Peptides Europe
Research Peptides Europe: claims vs COA
Website claim: 99.8% purity. “…Research Peptides Europe We supply research-grade preptides 99.8% pure for reliable scientific laboratory performance. Utra‑pure,…” Source (read 2026-09-25)
44
certificates read
14 / 18
vials outside ±3% of label
7
beyond ±10% (major)
17 / 44
below advertised purity
| Product | Label → measured | Purity | Main impurity | Lab | COA |
|---|---|---|---|---|---|
| MOTS-c 40 mg | 40mg → 46.6mg Overfilled +16.5% | 96% 3.80 pts below 99.8% | 4.00% not itemised | — | Open |
| Oxytocin 2 mg | 2mg → 2.23mg Overfilled +11.5% | 98.7% 1.10 pts below 99.8% | 1.30% not itemised | — | Open |
| DSIP 5 mg | 5mg → 4.41mg Underfilled -11.8% | 99.16% 0.64 pts below 99.8% | 0.84% not itemised | — | Open |
| KPV 10 mg | 10mg → 11.48mg Overfilled +14.8% | 99% 0.80 pts below 99.8% | 1.00% not itemised | — | Open |
| Pinealon 10 mg | 10mg → 8.76mg Underfilled -12.4% | 99.2% 0.60 pts below 99.8% | 0.80% not itemised | — | Open |
| VIP 10 mg | 10mg → 8.12mg Underfilled -18.8% | 99.2% 0.60 pts below 99.8% | 0.80% not itemised | — | Open |
| ARA-290 10mg | 10mg → 9.14mg Under label -8.6% | 99.1% 0.70 pts below 99.8% | 0.90% not itemised | — | Open |
| Epithalon 50 mg | 50mg → 46.4mg Under label -7.2% | 99.1% 0.70 pts below 99.8% | 0.90% not itemised | — | Open |
| GHRP-2 5 | — → 4.73mg Not checked | 97.9% 1.90 pts below 99.8% | 2.10% not itemised | — | Open |
| SNAP 8 10 mg | 10mg → 12.22mg Overfilled +22.2% | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| SS-31 (Elamipretide) 50 mg | 50mg → 54.4mg Over label +8.8% | 99.5% 0.30 pts below 99.8% | 0.50% not itemised | — | Open |
| AOD-9604 5 | — → 4.94mg Not checked | 99.6% 0.20 pts below 99.8% | 0.40% not itemised | — | Open |
| Cagrilintide 10 mg | 10mg → 10.35mg Over label +3.5% | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Cagrilintide 10 mg | 10mg → 10.35mg Over label +3.5% | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| GHK-Cu 100 mg | 100mg → 94.6mg Under label -5.4% | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| GHK-Cu 50 | — → 54.4mg Not checked | 99.5% 0.30 pts below 99.8% | 0.50% not itemised | — | Open |
| Klow | Blend, per-component content not listed | 98.9% 0.90 pts below 99.8% | 1.10% not itemised | — | Open |
| MOTS-C 10 | — → 10.36mg Not checked | 99% 0.80 pts below 99.8% | 1.00% not itemised | — | Open |
| Mazdutide 10 mg | 10mg → 10.21mg On label +2.1% | 99.7% 0.10 pts below 99.8% | 0.30% not itemised | — | Open |
| SLU-PP-22 10 mg | 10mg → 9.95mg On label -0.5% | 99.7% 0.10 pts below 99.8% | 0.30% not itemised | — | Open |
| Sermorelin 10mg | 10mg → 9.04mg Under label -9.6% | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Tesamorelin 5 | — → 5.14mg Not checked | 98.8% 1.00 pts below 99.8% | 1.20% not itemised | — | Open |
| 5-Amino 1 MQ 10 | Not measured | 99.8% Meets 99.8% | 0.20% not itemised | — | Open |
| BPC-157 5 | — → 5.81mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| BPC-157 and TB-500 5 mg | Blend, per-component content not listed | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| CJC-1295 NO DAC | — → 5.15mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| CJC-1295 and Ipamorelin 5mg/5mg | Blend, per-component content not listed | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| CJC-1295 with DAC | — → 4.82mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Epithalon 10 | — → 10.9mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| FOX O4 DRI 10 | — → 9.61mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| FOX O4 DRI 10 | — → 9.61mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Glow | Blend, per-component content not listed | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Glutathione 1500 | 1500mg → 1519mg On label +1.3% | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Ipamorelin 10 | — → 10.69mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Kisspeptin 5 | — → 9mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| LL-37 5 mg | 5mg → 5.05mg On label +1.0% | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Melanotan 1 10 | — → 10.09mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Melanotan 2 10 | — → 10.78mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| NAD+ 100 | — → 100.8mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| PT-141 10 | — → 11.54mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| SS-31 10 | — → 9.03mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Selank 5 | — → 5.59mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Semax 5 | — → 5.62mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
| Thymosin Alpha-1 | — → 4.87mg Not checked | >99.8% Meets 99.8% | under 0.20% not itemised | — | Open |
How this is checked
- Vial content. Measured net peptide content against the size on the label. Within ±3% is on label, 3–10% is off label, beyond ±10% is a major deviation (under- or overfilled). When a certificate weighs several vials of the batch, the vial farthest from the label is the one judged, and with several purity results the lowest counts. Blends are only checked when the certificate lists each component.
- Purity. HPLC purity on each certificate against the purity the supplier promises site-wide on its own website. Up to 1 point below the claim is amber, more than that is red. Only a direct promise counts (“99%+ purity guaranteed”); explanations of what purity means, one product's figure and page code are not treated as a claim. A certificate that reports only a bound (“>99%”) is judged only when the bound meets the claim, and a specification line is never read as a result.
- Whose certificate. A certificate is only read once our client-identity review has looked at it, and one issued to a different company is left out — whether the automatic check or a manual review found it. A certificate issued to the company that runs the supplier's own website counts as the supplier's. A file hosted on another supplier's website is not counted for this one. The same rules decide which certificates appear on supplier and product pages. Only peptide certificates are read: bacteriostatic water, acetic acid and other diluents are left out, and so are product data sheets, which state a specification rather than a batch result.
- Main impurity. Shown when the certificate itemises it: a named impurity (TFA, deletion sequence, oxidation…) or the largest secondary peak in the HPLC peak table. Most certificates report only a purity figure, so the rest of the sample is not itemised.
- Trust Score. These checks are 10 of the 25 Transparency points: vial content 7 (full credit within ±3%, half up to ±10%, none beyond, over- and underfilled alike), purity 3 (98% is the bar when a supplier advertises no figure). Fewer than 5 readable results gives half credit rather than a guess.
- These are the supplier's own published certificates, read automatically from the PDF or image. Janoshik results tables are read twice from the image, cell by cell, and a figure the two readings disagree on is left out rather than guessed. A certificate covers one batch on one date. We have not tested these batches ourselves.