Your body requires essential minerals and vitamins for every process and function. These nutrients work in symphony to grow, heal, repair and maintain your body''s cells, organs, systems and skeleton. Vitamins and minerals are needed in varying amounts and some form key parts of structures such as red blood cells and bones. Deficiencies of minerals and vitamins can lead to fatigue, illness and disease. A balanced daily diet generally provides the essential nutrients your body needs to stay healthy; a doctor can determine if you require vitamin or mineral supplements to enhance your regular nutrition.