The invention is directed to a method for administering antioxidant micronutrient formulations comprising certain multiple dietary and endogenous antioxidants, B-vitamins, vitamin D, and minerals at appropriate doses and dose-schedules, particularly chosen to reduce acute and long-term adverse effects of environmental and physical stressors and toxic chemicals in Operating Forces, e.g., military troops, during training and in combat. The invention additionally encompasses a variety of antioxidant micronutrient formulations that are useful in reducing, if not entirely eliminating, acute and/or chronic damage in Operating Forces produced by free radicals and products of inflammatory reactions that are generated by the environmental and physical stressors and toxic chemicals to which such Operating Forces may be exposed.