For instance, PLGA polyester decomposes in the body to produce lactic acid and glycolic acid, allowing the encapsulated immune antigens to gradually release and achieve the effect of continuously stimulating the body's immune system
Xcel Peptides Xcel Peptides also carries GHK-Cu made in the USA, with perks like: Lab-Tested GHK-Cu: Xcel Peptides GHK-Cu is tested by an independent laboratory called Janoshik to assure researchers of the products identity and purity
A Nature Scientific Reports 2016 study showed GHK-Cu had no cytotoxicity to human keratinocytes at concentrations up to 5,800 M over 72 hours and did NOT induce inflammatory biomarkers (IL-1, IL-8, HSPA1A, FOSL1) unlike other copper compounds, concluding GHK-Cu has a low potential of inducing skin irritation
Louvet A, Thursz MR, Kim DJ, Labreuche J, Atkinson SR, Sidhu SS, et al