Many iron supplements contain ferrous sulfate, an inorganic form of iron. Complete Iron Mini-Tabs includes a daily amount of 30 mg of Ferractiv® iron—a gentle, non-constipating form of iron shown to have fewer side effects. The formula also includes 100 mg of vitamin C to support iron absorption. If you are a woman of child-bearing age, pregnant or nursing, vegetarian, or a performance athlete, maintaining proper iron levels is essential to optimal health. Complete Iron Mini-Tabs help ensure that your iron levels stay steady and healthy.