SOD1 and type 2 diabetes mellitus: Chinese propolis supplementation (900 mg/day for 18 weeks, n = 25) had negligible effects on the levels of serum glucose, glycosylated hemoglobin, insulin, FRAP, MDA, SOD, GPx, IL-1β, and TNF-α in T2DM patients compared with the control group (n = 30) [309].