Lever
Lifestyle
- Regular exercise
- Adequate hydration
- Avoiding excessive alcohol consumption
Blutwerte · Marker
Bilirubin gesamt
Total Bilirubin · TBIL · Gesamtbilirubin
LeberwerteZeitabhängig
- Einheit:
- µmol/L
- Abbreviation
- TBIL
Total Bilirubin quantifies the combined levels of direct and indirect bilirubin in the blood.
Reference Ranges
Reference
5–21µmol/L
5
8
15
21
LowNormalHigh
Reference
Optimal
Unit · µmol/LReference ranges may vary slightly based on laboratory standards and methods.
Overview
Übersicht
Total Bilirubin (TBIL) is a blood biomarker that measures the total amount of bilirubin in the bloodstream, including both direct (conjugated) and indirect (unconjugated) bilirubin. 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. Clinically, TBIL is an important marker for liver function and can indicate liver diseases such as hepatitis, cirrhosis, and bile duct obstruction. Elevated TBIL levels may also reflect hemolytic anemia or other conditions causing increased red blood cell breakdown. For athletes and biohackers, monitoring TBIL can provide insights into liver health and the body's ability to process and clear waste products efficiently. However, it is important to consider that TBIL levels can be influenced by factors such as fasting, time of day, and certain medications. Researchers have observed that TBIL levels may vary with these factors, and thus, consistent testing conditions are recommended for accurate monitoring.
Klinische Bedeutung
Elevated TBIL levels can indicate liver dysfunction, bile duct obstruction, or hemolytic anemia. Reduced levels are generally not clinically significant but may reflect a decrease in red blood cell turnover.
Dynamics
Trend Interpretation
Rising Values
Progressively rising TBIL values suggest worsening liver function or increased hemolysis. Re-test in 4 weeks if outside optimal range.
Falling Values
Falling TBIL values may indicate improvement in liver function or resolution of hemolysis.
Re-test Interval
4 weeks if outside optimal range
Etiology
Causes — High & Low
Cause
Elevated Levels
- Liver disease
- Bile duct obstruction
- Hemolytic anemia
- Gilbert's syndrome
- Drug-induced liver injury
Cause
Low Levels
- Not clinically significant
- Decreased red blood cell turnover
- Overhydration
- Certain medications
Protocol
How to Optimize
Lever
Nutrition
- Consuming a balanced diet rich in antioxidants
- Avoiding high-fat foods
- Incorporating liver-supportive foods like leafy greens
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; testing at the same time is recommended.
Testing Frequency
Annually for healthy adults, more frequently if liver disease is suspected.
Interfering Factors
- Recent intense exercise
- Certain medications
- Dehydration
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 conditions, nor have they fully addressed confounding factors such as age and body mass index that may influence bilirubin elevation. Clinical questions remain regarding the predictive value of bilirubin levels in specific patient populations, particularly in the context of drug-induced liver injury and sepsis-associated liver injury.
30 Research Publications
347
Total Citations
25
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 crucial for detecting liver injury before symptoms appear. The study emphasizes the importance of comprehensive assessments to establish the cause of hepatobiliary diseases. Noninvasive tests for liver fibrosis are also highlighted as promising diagnostic tools.
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 determined a reference range for total bilirubin levels in athletes, finding that elevated bilirubin concentrations were common due to regular exercise. The study established an upper limit of 29.0 μmol·L-1 for athletes.
04
#04
Drug-induced liver injury related to avacopan therapy.
HumanInfluence3.0
28
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. The study highlighted risk factors for severe DILI, including older age and lower body mass index.
05
#05
Laboratory measurement of bilirubin.
Review
23
This review discusses various methods for measuring total bilirubin and its fractions in serum. Researchers emphasize the importance of understanding laboratory methods and reference ranges for accurate patient management. The study highlights the need for clinicians to be familiar with the specific methods used in their institutions.
06
#06
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.
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 on liver cancer risk. Researchers found that higher total bilirubin levels were associated with an increased risk of liver cancer, particularly in individuals with unhealthy sleep patterns.
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
Changes and Clinical Significance of PIVKA-II in Hepatitis E Patients.
Chen Youran, et al. · Frontiers in public health · 2021
Human
8
This study investigated the relationship between PIVKA-II levels and liver function in hepatitis E patients. Researchers observed that elevated PIVKA-II levels correlated with higher total bilirubin levels, indicating hepatic insufficiency. The findings suggest that PIVKA-II may serve as a marker for disease progression in hepatitis E.
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.
10
#10
Kratom (Mitragyna speciosa)-Induced Hepatitis.
Case Report
7
This case report provided insights into kratom-induced liver injury, highlighting significant elevations in total bilirubin and alkaline phosphatase. Researchers documented the histological features of the liver damage, contributing to the understanding of kratom's hepatotoxicity as its use increases.
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