“First, a linear mixed-effects … four-week consumption of KBR … oxidized glutathione (GSSG, q = 0.027) level, the ratio of reduced glutathione (GSH) to GSSG (q = 0.039) in erythrocytes, malondialdehyde (… = 0.006) levels in plasma, and seventeen NMR metabolites in urine compared with those in the placebo group.”