This randomized, double-blind, placebo-controlled study by M. Hariri et al. aimed to investigate the effects of probiotic (L. plantarum A7) supplemented soy milk compared to unsupplemented soy milk on MLH1 and MSH2 promoter methylation and oxidative stress among type 2 diabetic patients. The gene discussed is MLH1; the disease is type 2 diabetes mellitus.