What does it mean if bilirubin levels are low?

Bilirubin levels below the normal range (usually 3.4~17.1 μmol/L) are generally considered low. This condition may be caused by factors such as anemia (especially iron deficiency anemia), increased red blood cell destruction, menstrual irregularities, nutritional deficiencies during pregnancy (such as zinc deficiency), and poor diet (e.g., lack of iron-rich or blood-containing foods). Additionally, excessive consumption of spicy and irritating foods, cirrhosis, aplastic anemia, and chronic nephritis may also lead to low bilirubin levels. When low bilirubin levels occur, timely medical consultation is recommended to perform relevant examinations and determine the underlying cause, followed by appropriate treatment based on the specific condition. In daily life, maintaining good dietary habits and a positive lifestyle can also help prevent low bilirubin levels.