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F.JaskiB.et al (2011)
This figure comes from studies on plasma peptide turnover rather than from a large dedicated GHK-Cu pharmacokinetic RCT, so treat it as an estimate with meaningful uncertainty
Can I take GABA with ipamorelin
10.1177/0960327116677355 63 LuC.ZhangF.XuW.WuX.LianN.JinH.et al (2015)
The strongest evidence involves small older insomnia studies showing modest short-term sleep effects, but no large modern randomized trials have confirmed reliable clinical benefits or established long-term safety
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