IFNG and type 2 diabetes mellitus: In comparison to the placebo group, T2DM subjects post-3 months supplementation with L-GSH had a significant several-fold increase in the production of both IFN-γ (Figures 6B, C) and TNF-α (Figures 6D, E) in the granuloma supernatants from the L-GSH group at both 8-days and 15- days post in vitro BCG infection.