Patients see a smaller waistline, less deep abdominal fat, and preserved muscle
The strongest interpretation is that formulation, route, condition, and study design determine how much confidence a claim deserves
doi:10.1210/en.2003-0723
Sikiric and colleagues have repeatedly characterized it as "stable in human gastric juice," a property attributed to its high proline content and the absence of cleavage-prone residue pairs (Sikiric et al., 2018)
When collagen levels improve, many people notice: Skin that feels firmer Smoother texture Brighter tone Better overall skin health Because of this, many patients use GHK-Cu alongside treatments like microneedling or facials to support skin recovery
If you take good care of it today, your future self will thank you