In published medical and biochemical literature, GHK-Cu is associated with signaling that supports extracellular matrix maintenance, including collagen and elastin-related pathways
Medicina (Lithuania)
After its launch, the drug also became widely known for its weight-loss effects, which led Novo Nordisk to introduce Wegovy, a separate brand approved specifically for weight loss
The regulator advises that many products promoted online as peptides are not included on the Australian Register of Therapeutic Goods (ARTG), meaning they have not been assessed for safety, quality or effectiveness
The companys stock has fallen about 58% over the past year as the company has trimmed its guidance for 2025
Clinical data on Retatrutide and testosterone specifically is limited, but extrapolation from similar medications and weight loss outcomes suggests favorable effects