1. Immune Defense at the Cellular Level Zinc and Vitamin C are foundational for immune cell signaling and response, while glutathione supports intracellular defense mechanisms. Together, they help the body stay resilient Glutathione deficiency induces epigenetic alterations of vitamin D metabolism genes in the livers of high fat diet fed obese mice Scientific Reports 5 Nutrients to Support Autoimmune Disease DrJockers.com What To Avoid When Taking Glutathione