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The Turnock paper describes users who tried BPC for tendon issues and reported it did absolutely nothing being met with responses suggesting they had bought poor quality product or were expecting a miracle cure. This is exactly the rhetorical structure of a supplement company defending against negative reviews

Introduction to Epithalon Epithalon, also known as Epitalon, is a synthetic peptide that has captured the attention of scientists and longevity enthusiasts alike

BPC-157, a synthetic peptide, shows promise in strengthening the immune system

93 Typical linkages between the hydrophilic and hydrophobic parts involve ester, ether, amide, and disulfide bonds

Legally suspect: I went through the site of a popular self-proclaimed biohacker that had a handful of peptides on offer (far fewer than most research-use-only websites)