Certified-PEP Releases 2026 Research Peptide Supplier Comparison

Certified-PEP, a U.S.-based supplier of peptides and compounds for laboratory research, has published its 2026 Research Peptide Supplier Comparison, evaluating 10 suppliers on criteria such as independent laboratory testing, Certificates of Analysis (COAs), manufacturing disclosures, customer reviews, and purchasing information. The comparison, conducted in October 2026, used a 100-point scoring system to assess documentation, transparency, and other factors relevant to research customers. Certified-PEP itself was among the suppliers evaluated, and the company has made its scoring methodology and individual supplier results available in the full report.

The study examined publicly available supplier information and purchasing processes for the following 10 suppliers (listed alphabetically): American Peptides, BioLongevity Labs, Certified-PEP, Glacier Aminos, Hydro Research, Instant Peptides, Ion Peptide, Mile High Compounds, Modern Peptides, and Phoenix Pharmaceuticals. The evaluation covered testing and COA transparency, manufacturing disclosures, customer reviews, pricing, checkout functionality, shipping information, and payment options. The findings revealed differences among suppliers in the availability of manufacturing information, independent testing documentation, public customer reviews, and purchasing options. A key focus was the accessibility of Certificates of Analysis and the extent to which suppliers provide batch-specific analytical testing information, identify testing laboratories, and disclose manufacturing origins. The comparison emphasizes the importance of reviewing supplier documentation rather than relying solely on product descriptions or general quality claims.

Certified-PEP highlights its own approach to testing and transparency, including U.S. manufacturing, independent batch testing by Vanguard Laboratory, and QR codes on every vial that link to batch-specific documentation. The company stresses that a COA documents specified analytical tests but does not establish safety or efficacy for human use. The 2026 comparison is intended as a structured framework for research customers to evaluate suppliers, and the published comparison includes side-by-side comparisons, scoring results, analytical documentation examples, and a checklist of questions for evaluating suppliers. As Certified-PEP conducted the study and participated in the evaluation, the findings represent a company-published comparison rather than independent third-party research. For more information, visit Certified-PEP.