Though lab-made peptides are touted as a cure-all, they are not FDA-regulated and pose serious risks, experts warn

Here’s a new trend that sounds unwise: buying unregulated substances from dealers in foreign countries and injecting them into your body.

And yet, grey-market injectable peptides – a category of substances with obscure, alphanumeric names like BPC-157, GHK-Cu, or TB-500 – have developed a devoted following among biohackers and health optimizers.