is ghk-cu fda approved FDA-Approved? - News GHK-CU - Research Peptide -
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Guyenet SJ, Furrer SA, Damian VM, Baughan TD, La Spada AR, Garden GA

6-mercaptopurine (6-MP, Purinethol) suppresses the immune system by interfering with DNA synthesis

2015;10 doi: 10.1371/journal.pone.0130532

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Seregin SS, Golovchenko N, Schaf B, Chen J, Pudlo NA, Mitchell J, et al
