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Rather than binding directly to the enzyme active site, copper ions interfere with the enzymes function at concentrations achievable through topical or injectable application

(2014) "BPC 157 and standard angiogenic growth factors." Life Sciences, 97(2):263-267

Professional athletes or those subject to anti-doping regulations some sources list AOD 9604/its class in prohibited peptide/therapeutic groups

Cell Reports (2019) 8

It also has a part to play in approximately 100 vital bodily functions, including: Protein conversion DNA synthesis Fatty acid production Neurological function cobalt

Alternatively, it can be injected for more specialized use-cases but it hasn't been FDA-approved for this application