Like all cells in the human body, red blood cells experience a life cycle of creation, maturation, and then destruction. When a red blood cell has reached the end of its life, it is broken down into its base component—one of which is bilirubin, a yellow pigment. The bilirubin will then circulate through the blood on its way to the liver where it will be excreted into the bile duct and stored in our gall bladder. Eventually, it will be released into the small intestine to aid in the digestion of fats and ultimately is excreted in stool. There are two forms of bilirubin that can be measured by a blood test: conjugated (direct) and unconjugated (indirect). All of the bilirubin in our body together is called “total” bilirubin. “Direct” or “conjugated” bilirubin indicates that a sugar has been attached to it. “Indirect” or “unconjugated” bilirubin indicates the absence of a sugar. The important distinction is that direct bilirubin is water soluble, while indirect bilirubin is not. Blood tests to assess bilirubin will measure total, direct, and indirect. Comparing the three results will provide information regarding the condition that may be present, including: damage to the liver, liver disease, jaundice (yellowing of the skin / eyes), and cancer of the gallbladder or pancreas.
Normal ranges in mg/dL:
0-1 days: 2.0-6.0
2-5 days: 6.0-10.0
6-30 days: 4.0-8.0
>30 days: 0.3-1.2
A low level of total bilirubin in the blood is not a cause for concern. There are some medicines/supplements (like vitamin C) that can cause bilirubin levels to drop, but there are no detrimental effects associated with this.
In adults, an elevated level of total bilirubin typically points to a blockage or disease of the liver, bile ducts, or gallbladder. Possible diseases include: viral hepatitis, cancer of the liver, and alcoholic liver disease. Blockages are usually caused by gallstones, tumors, or scarring.
In newborn babies, infant jaundice (yellow discoloration of the skin caused by an excess of bilirubin) isn’t unusual and typically resolves within a few days or weeks; however, a bilirubin level that remains elevated in an infant can indicate a variety of physiological issues, including: blood type incompatibility with the mother, an infection of the blood, viral or bacterial infection, and liver disease.
$79 per year
$6.60 per month billed annually
Use promocode
$79 per year
$250 single payment
$45 per month
Save time on interpreting lab results with the largest database of biomarkers online. In-depth research on any test at your fingertips, all stored and tracked in one place.
Learn More
At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.
Abnormal Protein Band 1, Alanine-aminotransferase (ALT, SGPT), Albumin, Serum, Albumin/Globulin (A/G) Ratio, Alkaline Phosphatase (ALP), Alpha-1-Globulin, Serum, Alpha-2-Globulin, Serum, Aspartate-aminotransferase (AST, SGOT), Beta Globulin, Serum, Beta-1-Globulin, Serum, Beta-2-Globulin, Serum, Bilirubin Direct, Bilirubin Indirect, Bilirubin Total, Gamma Globulin, Serum, Gamma-Glutamyl Transferase (GGT), Globulin, Serum, Pre-Albumin, Total Protein, Serum
