To determine if someone is anemic, we should look at the red blood cell count and hemoglobin level in a complete blood count. Currently, hemoglobin level is the commonly used indicator clinically. Normal hemoglobin levels are 110~150g/L for women and 120~160g/L for men. Anemia is diagnosed when the hemoglobin level falls below the normal range. Based on the amount of hemoglobin, anemia can be classified into very severe, severe, moderate, or mild. Hemoglobin levels above 90g/L indicate mild anemia, levels between 60~90g/L indicate moderate anemia, levels between 30~60g/L indicate severe anemia, and levels below 30g/L indicate very severe anemia.