It’s not for the needle-shy. The drugs are sold in vials, and users reconstitute the powder in sterile water, suck the substance into a syringe, stick the needle under their skin, and blast it into their body. These are peptides, short chains of amino acids that, when made naturally in the body, serve a wide range of functions, including stimulating the release of human growth hormone to build muscle and repair injury. Olympic athletes, bodybuilders, and major leaguers have sought out synthetic versions or variants of peptides, easily manufactured in a lab, in an attempt to speed recovery from injury…
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