(Although the peptide aims to free p53 to kill senescent cells, not inhibit p53)
Three buyer paths exist: peptide-vendor bac water (sold alongside research peptides, often produced or repackaged for that purpose), pharmaceutical-grade direct from Pfizer/Hospira or distributors (USP-spec, intended for medical use), and online marketplaces (Amazon, eBay, third-party storefronts)
BPC 157 has a finalized Nexus Lab Verified record that reports 99.65% HPLC area-percent purity for the represented batch
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Epithalon is a synthetic tetrapeptide isolate composed of the four amino acids alanine, glutamic acid, aspartic acid, and glycine