Australians are being warned to think twice before buying unregulated peptides online, with experts cautioning the products can be dangerous and, in some cases, deadly. Her brother Alex died at 33 after suffering a heart attack following years of using body enhancement drugs, including peptides. “It’s really something that is just really hard to explain there’s just no words for such a pain.” Credit: 7NEWSShe said she only discovered Alex was using peptides a few years before he died. The University of Queensland researcher Dr Timothy Piatkowski said young Australians are being heavily targeted online.