What is a Good Bilirubin Level?
A good bilirubin level depends on your age. For adults over 18, a total bilirubin level of up to 1.2 milligrams per deciliter (mg/dL) is generally considered normal. For those under 18, the normal level is typically up to 1 mg/dL. Newborns, however, can have significantly higher levels, with normal ranges reaching as high as 12 mg/dL. Normal conjugated (direct) bilirubin should be less than 0.3 mg/dL across all age groups. It's crucial to remember that normal ranges may vary slightly between different laboratories.
Bilirubin is a yellowish pigment produced during the breakdown of old red blood cells. The liver processes bilirubin, excreting it through bile. High bilirubin levels can cause jaundice (yellowing of the skin and whites of the eyes), indicating potential problems with the liver, gallbladder, or bile ducts. Low levels are less common and may indicate other underlying health conditions.
Normal Ranges by Age Group:
- Adults (over 18): Total bilirubin up to 1.2 mg/dL; Conjugated bilirubin less than 0.3 mg/dL.
- Children (under 18): Total bilirubin up to 1 mg/dL; Conjugated bilirubin less than 0.3 mg/dL.
- Newborns: Total bilirubin can reach up to 12 mg/dL.
Importance of the Bilirubin Test
A bilirubin test is often part of a comprehensive liver function test panel. It helps diagnose various health conditions, including:
- Jaundice
- Anemia
- Liver disease
- Bile duct blockages
The test measures both total and direct (conjugated) bilirubin levels, providing a more detailed picture of liver function. Results are interpreted alongside other clinical information and medical history.
Resources for Further Information:
Several reputable sources provide additional information on bilirubin levels and testing:
