The prime causes of reduced GSH and SOD are toxic materials like HF (hydrogen fluoride), AlFx, DEET, mercury, PCB, chlorine, insecticides, and a lack of vegetables and fruits in diets. Everyone in the US today has some degree of GSH and SOD suppression and the problem worsens with age. Many of these toxic materials highly retain in the body and the leading problems come from mercury, PCBs, and fluorides. The mercury component and the bad diets lead many vets to get many of the Gulf War Illness symptoms just due to the many killed vaccines they received that employed mercury.
I have read that copper deficiency can cause grey hair. (laughter)
Maybe so, but the above paragraph seems to ring that bell of truth REAL LOUD!