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2. Normal Bilirubin Levels and How They're Measured

Doctors measure bilirubin levels through a blood test, which checks for two forms of bilirubin: indirect and direct. Indirect bilirubin is created when red blood cells break down and is carried in the blood attached to a protein called albumin. The liver processes this into direct bilirubin, a form the body can excrete through bile.

Blood tests can measure indirect, direct, or total bilirubin levels (a combination of both types). Normal total bilirubin levels are typically around 1.2 milligrams per deciliter (mg/dL) for adults and 1 mg/dL for children.

While low bilirubin levels are usually harmless, elevated levels can signal issues in the liver, bile ducts, or gallbladder. These tests help healthcare providers decide if additional testing or treatment is necessary.

Bilirubin colorful word with stethoscope on the wooden background

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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.