Iron supplements containing the ferrous form of iron are the most common treatment for anemia, a disease involving low red blood cell counts, according to WebMD. The ferrous form of iron is particularly useful because the body can absorb it easily.
If low red blood cell count is due to vitamin B12 deficiency, physicians often prescribe injectable B12 supplements, says WebMD. Vitamin B12 deficiency is usually permanent, so patients must continue to take these supplements throughout their lives.
Folate deficiency can also lead to anemia, WebMD writes. In such cases, a doctor is likely to recommend an increase in folate intake, either through supplements or through foods high in folate, such as cauliflower and broccoli.
Patients should take care when consuming supplements and should only do so in consultation with a physician, WebMD warns.