Glutathione is naturally present in fresh fruits, but you can also obtain it through glutathione tablets available on the market
GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Copper) is a naturally occurring copper complex of the tripeptide GHK, present in human plasma, saliva, and urine
Reported benefits (per available research): Studied for its ability to raise GH and IGF-1 toward youthful levels and blunt age-related loss of fat-free mass, based on a 2-year randomized, placebo-controlled trial in 65 healthy older adults (Nass et al., 2008, Annals of Internal Medicine, PMID 18981485)
Improving conventional or low dose metronomic chemotherapy with targeted antiangiogenic drugs
10.1074/jbc.274.17.11455 184 SatoM.KusumiR.HamashimaS.KobayashiS.SasakiS.KomiyamaY.et al (2018)