GHK-Cu, the copper tripeptide marketed for skin elasticity and collagen support, is one of the more reasonable cosmetic additions if you want to support skin during a weight loss journey
Although nanoparticle drugs have been rapidly incorporated into cancer treatment, they have encountered obstacles, including immunogenicity and cytotoxicity (118)
In recent years, the role of GPX3 in oxidative stress has been reported, for example: GPX3 can inhibit the expression of HIF1- by regulating ROS, thereby inhibiting the growth of melanoma cells (Yi et al., 2019)
doi: 10.1016/j.molmed.2021.06.014 155 LiHSunYYaoYKeSZhangNXiongWet al
But it is a story about supplying the rate-limiting building block, cysteine, so that hepatocytes can rebuild their own glutathione on demand not about flooding the bloodstream with the finished tripeptide in the hope of whitening skin