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bpc 157 and male fertility UPB BPC-157 5MG Peptides: The Science, Uses &
Description
(It appears to be a fragment of a larger gastric protein, but no one has traced it to a human gene

da Silva Z, Lehr HA, Velin D

Recombinant human thymosin beta 4 improves ischemic cardiac dysfunction in mice and patients with acute ST-segment elevation myocardial infarction after reperfusion

This is often done in phase 1 clinical trials during new drug development
