This study is being conducted to define the specific nutritional biomarkers and nutritional risk during the course of chemoradiation therapy for cancers of the head and neck. This prospective, longitudinal observational study is focused on specific antioxidants and B vitamins. The ORAC was selected as an index of overall antioxidant capacity. We chose to evaluate antioxidant status because administering antioxidants has been shown to reduce chemotherapeutic agent toxicities.