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. Thus a child should take vitamin C with the iron supplements.
Children can have too much iron and it can become toxic.
Always take iron and vitamin C under the supervision of a physician. We recommend frequent blood tests to insure that the iron is becoming absorbed into the blood stream. If it isn't then, more work by the Physician will be needed. Theoretically when the iron blood levels are normalized, improvements in concentration and eating should improve with time. For more information regarding Iron Deficiency in Children, please follow this link .