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(10) Xiao-Ming Zhou, Gui-Liang Wang, Xiao-Bo Wang, et al (2017) GHK Peptide Inhibits Bleomycin-Induced Pulmonary Fibrosis in Mice by Suppressing TGF1/Smad-Mediated Epithelial-to-Mesenchymal Transition Frontiers in Pharmacology, 2017 Dec 12, Volume 8, Page 904

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It is classified as a research chemical (WADA S0 non-approved substances category), and preclinical findings do not predict human outcomes

Whenever GH needs to be secreted (GH levels are typically highest during periods of fasting and sleep), the hypothalamus releases growth hormone-releasing hormone (GHRH)

PMID: 17409865