What causes a low hemoglobin level?

Let explain: Low hemoglobin count isn't always a sign of illness — it may be normal for some people. Women who are pregnant commonly experience low hemoglobin counts. Diseases and conditions that cause your body to produce fewer red blood cells than normal include: aplastic anemia and others. Diseases and conditions that cause your body to destroy red blood cells faster than they can be made:enlarged spleen.

Low iron: Low iron is one major cause of low hemoglobin. Other causes include those described in this review article: http://www.Mayoclinic.Com/health/low-hemoglobin/my01183/dsection=causes.

Anemia...: Anemia (low hemoglobin) is caused by the body losing blood (heavy periods, blood in stool), red blood cell instability (hemoglobinopathies), destruction (hemolysis), the bodies inability to produce new red blood cells (iron deficiency, for example), or a combination of these. Many causes of anemia are treatable, and some are inherited (sickle cell). Rarer causes include cancer.