The research literature and clinical practice provide guidance, but individual response varies
The short answer, which the rest of this article unpacks in detail, is that the human skin-benefit data for GHK-Cu are overwhelmingly topical , while the GHK-Cu injectable form sold in the research-peptide market rests on mechanism, animal studies, and extrapolation rather than on controlled human cosmetic trials
"Phase IIb study of intranasal glutathione in Parkinson's disease." J Parkinsons Dis
The key clinical question is whether the pituitary is the bottleneck
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We hypothesized that such c-Ret phosphorylation might result from transactivation as a consequence of the Met phosphorylation induced by hHGF or aML5-PEG3 in combination with a certain ligand present in the FBS
