This is the way that glutathione strengthens the immune system: Glutathione is an effective antioxidant, helping to neutralise free radicals and oxidative stress, which can harm immune cells and impair immune function
Benton C, Qiu P, Ravandi F, Kantarjian H, Garcia-Manero G, Pierce S, Borthakur A, Konopleva M, Cortes J, Andreeff M , Quintas-Cardama A
Targeting Free Radicals in Oxidative Stress-Related Human Diseases
So when you take it as a supplement, you're not giving your body food
Serine hydroxymethyltransferase 2: a novel target for human cancer therapy