Where is GHK-Cu legal?

On this site's national fields, GHK-Cu is permitted as a cosmetic ingredient in the US, UK, Australia, and Canada, and it is not an approved drug. That is a cosmetics classification, not a license to inject a research-chemical vial. This dataset has no state-by-state, province-by-province, or other sub-national legal detail, so 'where' here means those four national classifications only.

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of more absences and national fields. Further harvested questions after the first names-and-absences set: more side effects the citations did not count, compounding formulas this catalogue does not hold, national legal-status fields for compounds that only have those four countries, trial windows rather than an onset clock, and named prescription combinations with no interaction table.