Quality & Verification Guides
Buyer's Guide
How to Vet a Research Peptide Supplier (2026 Checklist)
A practical checklist for evaluating research peptide suppliers: independent third-party COAs, HPLC and mass-spec verification, purity thresholds, cold-chain shipping, and compliance signals.
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Quality Guide
How to Read a Peptide Certificate of Analysis (COA)
A field guide to reading a peptide Certificate of Analysis: HPLC purity, mass-spec identity, net peptide content, water content, endotoxin and sterility testing, and how to verify a COA is authentic.
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Analytical Methods
HPLC vs Mass Spectrometry: How Peptide Purity and Identity Are Verified
HPLC measures peptide purity; mass spectrometry confirms identity. A clear explanation of how the two complementary analytical methods verify research peptides, and why a COA needs both.
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Compound Comparisons
Compound Comparison
BPC-157 vs TB-500
A research comparison of BPC-157 and TB-500 — mechanism of action, molecular profile, and how the two regenerative research peptides are studied. CAS numbers and specifications included. Research Use Only.
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Compound Comparison
CJC-1295 vs Ipamorelin
A research comparison of CJC-1295 and Ipamorelin — two growth-hormone secretagogues studied through different receptor pathways (GHRH receptor vs ghrelin/GHS-R1a). Specifications and CAS numbers included. Research Use Only.
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Compound Comparison
Semax vs Selank
A research comparison of Semax and Selank — two synthetic neuropeptides studied for BDNF expression and GABAergic signaling respectively. Mechanism, CAS numbers, and specifications. Research Use Only.
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Compound Comparison
Tirzepatide vs Semaglutide
A research comparison of Tirzepatide and Semaglutide — a dual GIP/GLP-1 receptor agonist versus a single GLP-1 receptor agonist. Mechanism, molecular profile, and specifications. Research Use Only.
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Compound Comparison
Retatrutide vs Tirzepatide
A research comparison of Retatrutide and Tirzepatide — a triple GIP/GLP-1/glucagon agonist versus a dual GIP/GLP-1 agonist. Mechanism, CAS, and specifications. Research Use Only.
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