Peptide QC standards are becoming a competitive and regulatory battleground

Recent supplier materials reinforce that HPLC purity claims, generic COAs, ISO 9001 statements, and promotional cGMP language do not establish identity or absolute composition. Orthogonal identity testing, impurity profiling, counterion measurement, sterility, endotoxins, stability, validated methods, independent raw-data review, and traceability remain key differentiators; no independently verified supplier-quality breakthrough appeared.