Lever
Lifestyle
- Regular physical activity
- Adequate hydration
- Avoiding alcohol consumption
Blutwerte · Marker
Bilirubin gesamt
Total Bilirubin · TBIL · Gesamtbilirubin
LeberwerteNüchtern erforderlich
- Einheit:
- µmol/L
- Abbreviation
- TBIL
Total bilirubin measures the sum of direct and indirect bilirubin in the blood, reflecting liver function and hemolysis.
Reference Ranges
Reference
5–21µmol/L
5
8
15
21
LowNormalHigh
Reference
Optimal
Unit · µmol/LReference ranges may vary slightly based on laboratory standards. Fasting is recommended for accurate measurement.
Overview
Übersicht
Total bilirubin (TBIL) is a blood biomarker that measures the total amount of bilirubin in the bloodstream, encompassing 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 with glucuronic acid and excreted in bile. Researchers have found that TBIL levels are indicative of liver function and can reflect hepatic injury or dysfunction. Elevated TBIL levels are often associated with liver diseases such as hepatitis, cirrhosis, and bile duct obstruction, as well as hemolytic disorders. In clinical settings, TBIL is used to diagnose and monitor these conditions. For athletes and biohackers, TBIL may be relevant as a marker of liver health, which can be crucial for optimal performance and recovery. Elevated bilirubin has been suggested to have antioxidant properties, potentially contributing to longevity. However, researchers observed that TBIL levels can be influenced by factors such as fasting status, time of day, and recent physical activity. Therefore, it is important to standardize testing conditions to ensure accurate results. Interfering factors such as certain medications and supplements can also affect TBIL measurements, necessitating careful interpretation of results.
Klinische Bedeutung
Elevated TBIL levels indicate potential liver dysfunction or hemolysis, while low levels are generally not clinically significant. High TBIL can suggest liver diseases, bile duct obstruction, or hemolytic anemia.
Dynamics
Trend Interpretation
Rising Values
Progressively rising TBIL levels suggest worsening liver function or increased hemolysis. Re-test within 4 weeks if elevated.
Falling Values
Falling TBIL levels 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
- Potential laboratory error
- Dilutional effects
- Overhydration
Protocol
How to Optimize
Lever
Nutrition
- High-fiber diet
- Antioxidant-rich foods
- Avoiding processed foods
Lever
Supplementation
- Milk thistle
- N-acetylcysteine
Note:
Consult a healthcare provider for personalized advice, especially if considering supplements.
Testing Guidelines
🍽️Fasting Required
✓Not Time-Sensitive
Bilirubin levels can vary throughout the day; morning testing is standard.
Testing Frequency
Annually for healthy adults, more frequently if monitoring liver conditions.
Interfering Factors
- Recent intense exercise
- Certain medications
- Biotin supplementation
Open Research Questions
Current research suggests that the relationship between total bilirubin (T-Bil) levels and clinical outcomes, such as liver cancer risk and cardiovascular events, remains debated, particularly regarding optimal reference ranges and the impact of confounding factors like liver function and sleep quality. Emerging research directions include the exploration of T-Bil's role in various liver diseases and its prognostic value in cardiovascular health. However, clinical questions remain unanswered regarding the precise mechanisms by which T-Bil influences these outcomes.
19 Research Publications
265
Total Citations
15
Human/RCT
2.0
Avg. Influence
2025
Latest
Sort
Filter
01Top
#01
Evaluation of abnormal liver tests.
ReviewInfluence3.0
141
Researchers examined the role of serum biochemical tests, including total bilirubin, in detecting liver injury. The study highlighted the importance of these tests in identifying acute and chronic liver conditions before symptoms appear. Noninvasive tests for liver fibrosis were also discussed 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
Laboratory measurement of bilirubin.
Review
23
This review discussed various methods for measuring total bilirubin and its fractions in serum. Researchers emphasized the importance of understanding different laboratory methods and their implications for patient management, highlighting the need for familiarity with local testing practices.
04
#04
Drug-induced liver injury related to avacopan therapy.
HumanInfluence2.0
19
This study examined the incidence of drug-induced liver injury (DILI) in patients with ANCA-associated vasculitis treated with avacopan. 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
Clinical Significance of Albumin- and Bilirubin-Based Biomarkers in Glaucoma: A Retrospective Case-Control Study.
Human
13
This retrospective study examined the relationship between serum albumin and bilirubin levels in glaucoma patients. Researchers found that both total bilirubin and indirect bilirubin levels were significantly lower in glaucoma patients compared to healthy controls, suggesting potential biomarkers for disease severity.
06
#06
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
12
This study assessed the relationship between sleep patterns and liver function biomarkers, including total bilirubin, in relation to liver cancer risk. Researchers found that unhealthy sleep and elevated total bilirubin levels were associated with a significantly increased risk of liver cancer. The highest risk was noted in individuals with both unhealthy sleep and high liver function biomarker levels.
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.
07
#07
Clinical significance of serum bilirubin in primary Sjögren syndrome patients.
Human
6
Researchers examined the clinical significance of bilirubin levels in patients with primary Sjögren syndrome. They found that total bilirubin levels were significantly lower in these patients compared to healthy individuals, indicating its potential role in clinical diagnosis and monitoring.
08
#08
Circulating Total Bilirubin and Long-Term Prognosis in Patients With Previous Myocardial Infarction.
Human
5
This study explored the association between total bilirubin levels and long-term outcomes in patients with a history of myocardial infarction. Researchers found that higher total bilirubin levels within the normal range were linked to a reduced incidence of major adverse cardiovascular events. Conversely, levels above the reference range increased risk.
09
#09
Changes and Clinical Significance of PIVKA-II in Hepatitis E Patients.
Chen Youran, et al. · Frontiers in public health · 2021
Human
4
Researchers observed changes in PIVKA-II levels in hepatitis E patients and their relationship with liver function markers, including total bilirubin. The study found that elevated PIVKA-II levels correlated with higher total bilirubin and longer hospital stays. As patients improved, PIVKA-II levels decreased alongside bilirubin levels.
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
Clinical factors related to bilirubin encephalopathy in preterm infants: A case-control study.
Human
3
Researchers aimed to identify risk factors for bilirubin encephalopathy in preterm infants. They found that higher peak total bilirubin levels were associated with an increased risk of bilirubin encephalopathy. This indicates the need for careful monitoring of bilirubin levels in vulnerable infants.
Publication Trend
Research publications about Bilirubin gesamt over time
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