Taking some iron supplements may not be the solution to many children's iron deficiency problem. Absorption rates is a key factor. If the child's body is not absorbing the iron in the iron tablet, then it is not doing any good. Several factors help iron become absorbed in children. One of them is the type of mineral supplement.
Colloidal minerals are minerals in an ionized form.
Thus they are always liquid. These have the highest absorption rates. Second is the chelated vitamins and minerals. Some mineral supplements are neither colloidal nor chelated and may not become absorbed well in the body. Another important factor in absorption of iron is taking vitamin C with the iron.