Lever
Lifestyle
- Regular exercise
- Adequate hydration
- Avoid alcohol and hepatotoxic substances
Blutwerte · Marker
Bilirubin gesamt
Total Bilirubin · TBIL · Gesamtbilirubin
LeberwerteZeitabhängig
- Einheit:
- µmol/L
- Abbreviation
- TBIL
Total Bilirubin quantifies the total amount of bilirubin in the blood, including both conjugated and unconjugated forms.
Reference Ranges
Reference
5–21µmol/L
5
8
15
21
LowNormalHigh
Reference
Optimal
Unit · µmol/LReference ranges may vary slightly between laboratories. Fasting is not required, but levels can vary with time of day.
Overview
Übersicht
Total Bilirubin (TBIL) is a blood biomarker that measures the total amount of bilirubin in the bloodstream, including both conjugated (direct) and unconjugated (indirect) forms. Bilirubin is a yellow compound that occurs in the normal catabolic pathway that breaks down heme in red blood cells. It is processed in the liver, where it is conjugated and excreted in bile. Researchers have found that TBIL is clinically significant as it reflects liver function and can indicate liver disease or hemolytic anemia. Elevated TBIL levels are often associated with liver dysfunction, such as hepatitis or cirrhosis, and can also indicate bile duct obstruction or hemolysis. In the context of athletic performance, biohacking, or longevity, maintaining optimal liver function is crucial for overall health and recovery. Bilirubin has antioxidant properties, and some studies suggest that slightly elevated levels might confer protective cardiovascular effects. However, researchers caution that confounding factors such as fasting status, time of day, and laboratory methods can affect TBIL measurements. It is important to consider these factors when interpreting results, as bilirubin levels can fluctuate based on diet, hydration, and circadian rhythms.
Klinische Bedeutung
Elevated TBIL levels can indicate liver dysfunction, bile duct obstruction, or hemolysis. Low TBIL levels are rare and typically not clinically significant but may occur in certain genetic conditions.
Dynamics
Trend Interpretation
Rising Values
Progressively rising TBIL values suggest worsening liver function or increased hemolysis. Re-test in 4 weeks if outside the optimal range.
Falling Values
Progressively falling TBIL values are generally not clinically significant unless associated with other symptoms.
Re-test Interval
4 weeks if outside optimal range
Etiology
Causes — High & Low
Cause
Elevated Levels
- Liver dysfunction
- Bile duct obstruction
- Hemolysis
- Drug-induced liver injury
- Gilbert's syndrome
Cause
Low Levels
- Rare genetic conditions
- Certain medications
- Overhydration
- Chronic kidney disease
Protocol
How to Optimize
Lever
Nutrition
- Increase antioxidant-rich foods
- Consume liver-supportive foods like leafy greens
- Limit processed foods
Lever
Supplementation
- Milk thistle
- N-acetylcysteine
Note:
Consult a healthcare provider before making significant lifestyle changes, especially if liver disease is suspected.
Testing Guidelines
✓Fasting Not Required
🕐Time-Sensitive
Bilirubin levels can vary throughout the day; consistent timing is recommended for repeat tests.
Testing Frequency
Annually for healthy adults, more frequently if liver disease is suspected.
Interfering Factors
- Recent intense exercise
- Dehydration
- Certain medications
Open Research Questions
Current research suggests that reference ranges for total bilirubin may vary significantly between laboratories, leading to potential misinterpretation of results. Researchers have not yet established optimal targets for bilirubin levels in various liver diseases, particularly in the context of drug-induced liver injury. Additionally, clinical questions remain unanswered regarding the long-term outcomes of patients with elevated bilirubin levels post-treatment and the specific confounding factors influencing bilirubin metabolism in diverse populations.
26 Research Publications
342
Total Citations
21
Human/RCT
2.5
Avg. Influence
2025
Latest
Sort
Filter
01Top
#01
Evaluation of abnormal liver tests.
ReviewInfluence3.0
142
Researchers found that routine serum biochemical tests, including total bilirubin, are essential for detecting liver injury before symptoms appear. These tests help assess liver function and metabolism, aiding in the diagnosis of hepatobiliary diseases.
02Top
#02
Basal Values of Biochemical and Hematological Parameters in Elite Athletes.
HumanInfluence1.0
38
This study examined the impact of continuous exercise on biochemical parameters in elite athletes. Researchers found that total bilirubin levels were higher in athletes compared to the general population, indicating that exercise may influence bilirubin levels. This highlights the importance of context when interpreting laboratory results.
03Top
#03
Total bilirubin in athletes, determination of reference range.
HumanInfluence3.0
30
Researchers aimed to establish a reference range for total bilirubin in athletes. They found that elevated total bilirubin levels were common and correlated with regular exercise, suggesting the need for specific reference values for this population.
04
#04
Drug-induced liver injury related to avacopan therapy.
HumanInfluence3.0
26
This study examined the incidence of drug-induced liver injury (DILI) related to avacopan therapy in patients with ANCA-associated vasculitis. Researchers found that 40.9% of patients experienced DILI, with severe cases showing elevated total bilirubin levels. Risk factors for severe DILI included older age and lower body mass index.
05
#05
Bilirubin measurements in neonates: uniform neonatal treatment can only be achieved by improved standardization.
Human
23
Researchers found that accurate measurement of total bilirubin (TBil) in neonates is crucial for diagnosing hyperbilirubinemia and preventing overtreatment. The study emphasized the need for improved standardization in TBil measurements across laboratories to ensure uniform neonatal care. It also reviewed the role of external quality assessment programs in addressing discrepancies in TBil measurement methods.
06
#06
Laboratory measurement of bilirubin.
Review
23
This study summarized various methods for measuring total bilirubin and emphasized the importance of understanding laboratory-specific reference ranges. Researchers observed that accurate bilirubin determinations are crucial for effective patient management.
07
#07
Clinical Significance of Albumin- and Bilirubin-Based Biomarkers in Glaucoma: A Retrospective Case-Control Study.
Human
13
This study explored the relationship between serum albumin and bilirubin levels and glaucoma severity. Researchers observed that glaucoma patients had significantly lower total bilirubin levels compared to healthy controls, and specific bilirubin ratios were associated with greater visual impairment. These findings suggest potential biomarkers for assessing glaucoma severity.
08
#08
Sleep and liver function biomarkers in relation to risk of incident liver cancer: a nationwide prospective cohort study.
Song Jiahao, et al. · BMC medicine · 2024
Human
13
This nationwide study assessed the impact of sleep and liver function biomarkers, including total bilirubin, on liver cancer risk. Researchers found that unhealthy sleep combined with high total bilirubin levels significantly increased liver cancer risk.
Key findings
- 01Unhealthy sleep was linked to a 46% higher risk of liver cancer compared to healthy sleep.
- 02Participants with both unhealthy sleep and elevated liver enzyme levels faced the highest cancer risk, with some combinations showing more than a threefold increase.
- 03The study highlighted a significant interaction between unhealthy sleep and high total protein levels in relation to liver cancer risk.
09
#09
Kratom (Mitragyna speciosa)-Induced Hepatitis.
Case Report
7
This case report detailed a patient with kratom-induced liver injury, highlighting significant elevations in total bilirubin and alkaline phosphatase levels. Researchers noted specific liver histological features associated with this toxicity.
10
#10
Changes and Clinical Significance of PIVKA-II in Hepatitis E Patients.
Chen Youran, et al. · Frontiers in public health · 2021
Human
7
Researchers investigated the relationship between PIVKA-II levels and total bilirubin in hepatitis E patients. They found that elevated PIVKA-II levels were associated with higher total bilirubin levels and indicated the degree of hepatic insufficiency.
Key findings
- 01Researchers found that 59.51% of hepatitis E patients had increased PIVKA-II levels.
- 02Patients with elevated PIVKA-II levels showed significantly higher serum total bilirubin and bile acid levels.
- 03The study highlights the potential role of PIVKA-II as a marker in hepatitis E.
Publication Trend
Research publications about Bilirubin gesamt over time
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