In fact, iron deficiency anemia is the most common form of anemia, as well as deficiency of vitamin B12 and folic Acid. 4 To produce red blood cells, our body needs iron, folic Acid and vitamin B12. Taking dietary supplements could compensate for inadequate intake of these important nutrients from diet. For adolescent with iron deficiency anemia, the Centers for Disease Control and Prevention (U.S.) recommends intake of 60mg elemental iron 1-2 times per day. 5