If you think you may have conditions such as low ferritin, iron deficiency, anemia or hypothyroid disease, you should consult with your doctor before beginning treatment. Treatment for low ferritin will often include supplementing your current diet with iron. This can be done through iron-rich food products such as lean meats, eggs, green and leafy vegetables, and whole grain bread products. The condition can also be aided by iron supplement medications available over-the-counter at your local pharmacy. Be sure to read the instructions and warnings on such supplements for your treatment.