This comprehensive multi-vitamin formula provides a wide range of key nutrients at clinically relevant levels. There are several reasons why an iron-free formulation might be suitable, such as people with iron sensitivity or postmenopausal women and men over 50, who require less iron in their diet. We have also omitted iodine from the formulation for people with thyroid problems. The formula contains vitamins C, E, A, D, B6, folic acid, B12, selenium, zinc, and copper, which are important for the immune system/natural defenses. In addition, it provides excellent levels of B vitamins, many of which are essential for energy metabolism (the transformation of food into energy). Iron-free, for people with iron sensitivity. For postmenopausal women and men over 50. Iodine-free, for those with thyroid problems. Excellent levels of B vitamins, which are needed to release energy from food. Good levels of antioxidant nutrients, vitamins C and E.