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Each is supplied as a lyophilized research-grade peptide with a per-lot certificate of analysis, for laboratory research use only

WADA Prohibition The World Anti-Doping Agency classifies both peptides as prohibited substances: Both listed under Section S0 (Non-Approved Substances) Prohibited at all times (in and out of competition) No Therapeutic Use Exemptions (TUEs) available for either peptide Detection methods under development for anti-doping testing TB-500 and thymosin beta-4 explicitly banned since 2011 WADAs position reflects that neither peptide has regulatory approval from any health authority worldwide

If you try to push apoB below 0.6 g/L across a broad healthy population, you are not mainly testing whether low apoB is biologically dangerous