Definition
Why it matters
[educational]A trustworthy peptide certificate of analysis is batch-specific and includes: HPLC + mass-spec identity/purity (target >99%), USP<85> endotoxin, and USP<71> sterility (heavy-metals a bonus). Injectables need all of these; oral forms need purity/identity (the gut tolerates small endotoxin/microbe loads). — BPC-157 deep dive