AnemiasAnemia is present in adults if the hematocrit is less than 41% (hemoglobin < 13.5 g/dL) in males or less than 37% (hemoglobin < 12 g/dL) in females. Congenital anemia is suggested by the patient's personal and family history. Poor diet results in folic acid deficiency and contributes to iron deficiency, but bleeding is much more commonly the cause of iron deficiency in adults.