What It Measures
This test measures the total amount of bilirubin in your blood. Bilirubin is formed when hemoglobin from old red blood cells is broken down in the spleen and liver. The liver processes (conjugates) bilirubin so it can be excreted in bile. Total bilirubin reflects both the unconjugated form (not yet processed by the liver) and the conjugated form (processed and water-soluble).
Total bilirubin measures the combined levels of conjugated (direct) and unconjugated (indirect) bilirubin in the blood, a yellow pigment produced during the normal breakdown of red blood cells. It is a key marker of liver function, bile duct patency, and red blood cell turnover, with elevations potentially indicating liver disease, hemolytic conditions, or biliary obstruction.
Current Value
What High Means
Elevated total bilirubin (hyperbilirubinemia) can indicate liver dysfunction (hepatitis, cirrhosis, fatty liver disease), bile duct obstruction (gallstones, tumors), hemolytic anemia (excessive red blood cell destruction), Gilbert's syndrome (a benign genetic condition affecting ~5-10% of the population), or medication side effects. Very high levels cause jaundice — yellowing of the skin and eyes. Mildly elevated bilirubin (1.1–2.0 mg/dL) in the context of Gilbert's syndrome may actually be protective due to bilirubin's antioxidant properties.
Possible Symptoms
Jaundice (yellowing of skin and eyes), dark urine, pale or clay-colored stools, fatigue, nausea, abdominal pain (especially right upper quadrant), itching (pruritus), loss of appetite, and in severe cases confusion or altered mental status.
What Low Means
Low total bilirubin levels are generally not clinically concerning but may be associated with reduced antioxidant capacity. Some research suggests very low bilirubin levels correlate with increased cardiovascular risk and metabolic syndrome, as bilirubin has potent antioxidant and anti-inflammatory properties. Low levels may also reflect low red blood cell turnover or efficient hepatic clearance.
Possible Symptoms
Low bilirubin is typically asymptomatic. However, chronically low levels may be associated with increased oxidative stress, though this does not produce specific symptoms.
Risk Factors
Liver disease (hepatitis, cirrhosis, fatty liver), hemolytic anemias, bile duct obstruction, gallstones, pancreatic cancer, Gilbert's syndrome, Crigler-Najjar syndrome, drug-induced liver injury, sepsis, congestive heart failure, and alcoholic liver disease.
Actionable Advice
Supplements
- •Milk thistle (silymarin)
- •N-acetyl cysteine (NAC)
- •Dandelion root
- •Artichoke extract
- •Turmeric/curcumin
- •Alpha-lipoic acid
- •Vitamin C
- •Glutathione
Diet & Lifestyle
- •Limit alcohol consumption to protect liver function
- •Maintain a healthy weight to prevent fatty liver disease
- •Stay well-hydrated to support bile flow and liver detoxification
- •Eat a diet rich in cruciferous vegetables, beets, and leafy greens to support liver health
- •Avoid unnecessary medications and hepatotoxic substances (e.g., excess acetaminophen)
- •Exercise regularly — moderate activity supports healthy red blood cell turnover and liver function
- •Manage stress, as chronic stress can impair liver function
- •Get adequate sleep to support liver regeneration (the liver is most active in detoxification during sleep)
Ask AI
Ask questions about your Total Bilirubin results, trends, and what you can do to optimize.
Only one data point — trend chart will appear after multiple tests.
Related Biomarkers
Resources & Studies
All Readings
| Date | Value | Change |
|---|---|---|
| 2026-01-28 | 0.6 mg/dL | — |