This is my favorite section:
3.5. Reduce Oxidative Stress
In vitro studies suggest that MSM does not chemically neutralize ROS in stimulated neutrophils but instead suppresses mitochondrial generation of superoxide, hydrogen peroxide, and hypochlorous acid [97]. Additionally, MSM is able to restore the reduced glutathione (GSH)/oxidized glutathione (GSSG) ratio to normal levels, decrease NO production, and reduce neuronal ROS production following HIV-1 Tat exposure [109].