Because there is not enough high-quality human evidence to support routine clinical use and they are not currently approved for use in Humans by Health Canada or the FDA
GHK-Cu is a naturally occurring copper peptide best known for skin repair, collagen stimulation, and anti-inflammatory effects, so its widely used for antiaging and barrier support
Following approved preparation standards improves safe handling during routine treatments
Both are typically preservative-free and intended for single use once opened
Manufacturer Ambiguity: Listings often hide the actual manufacturer, making lot traceability impossible
Summary Keywords anabolic androgenic steroids, AAS, post-cycle therapy, PCT, falsified medicines, cessation of AAS, SERMs, AIs Citation Blazewicz A, Poplawska M, Daniszewska B, Piorunska K and Karynski M (2025) Illegal and falsified medicines self-administrated in not approved post-cycle therapy after the cessation of anabolic-androgenic steroids qualitative analysis