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Peer review Peer review information Nature thanks William Colmers, Alan Watts and the other, anonymous, reviewer(s) for their contribution to the peer review of this work

Timothy Piatkowski, a senior research fellow at the University of Queensland who researches the harms of some peptides, said the TGA's safety alert was a "step forward"

Unlike the full hormone that affects growth, this fragment appears to specifically target fat cells in experimental settings

However, for digestion, controlling of bacteria and absorption of essential vitamins from food, Hydrochloric Acid is really important

Most peptides sold by US-based vendors come from a handful of synthesis labs in China