Neutralizing the threat of excess free radicals your body's natural defense system The NEI Connection Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols According to research, an excessive buildup of hydrogen peroxide is a primary cause of grey hair. This buildup bleaches the hair from the inside out and damages the melanocyte melanin producing cells Reactive oxygen species clearance MedLink Neurology Trait: Oxidative Stress Risk (GPx 1) FitnessGenes