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Suppliers who provide independent third-party HPLC certificates, rather than in-house testing only, offer a higher degree of quality assurance relevant to research integrity

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Together this phenomenon is collectively referred to as the gray market. This gray market is not subject to the quality control regulations that govern the pharmaceutical industry, and testing conducted on a range of peptides including MOTS-c, BPC-157, TB-500, and CJC-1295 by The New Yorker in April showed that many were impure or contained less than the advertised dose