glutathione autoimmune diseases Frontiers 9 Health Benefits of Glutathione

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

Additionally, we reviewed its particular effects, such as the non-steroidal anti-inflammatory drugs (NSAIDs) toxicity counteraction (Sikiric et al., 2013

The copper binding must be precise

Which is why you should choose an alternative that has superior bioavailability like Performance Lab Immune's Setria Glutathione