Research context
GHK and GHK-Cu literature spans biochemical work, cell models, animal models, reviews, and limited human investigations. These evidence types answer different questions and should not be treated as interchangeable.
Evidence hierarchy
Mechanistic plausibility and preclinical observations can support further study, but they do not independently establish clinical safety or efficacy.
Catalogue distinction
The literature concerns the compounds and preparations described by each paper. It does not verify an Emberon lot, concentration, sterility status, or intended application.