Hi Sajeda,
Wheatgrass can be very helpful, but for a young child, either the extract, which is extremely easy to take, or wheatgrass powder mixed in liquid would be the easiest form. Folate and wheatgrass work together, so add folate, as well. 400 mcg would be good at this age. A healthy diet, high in nutrients is advised. If the Hb is below 10, high iron foods like red meat should be minimized, to lower the added iron absorption that takes place in low Hb patients. At this age, it is important to make an effort to install good eating habits, eating nutritious real foods and avoiding junk food.