Lever
Lifestyle
- Regular monitoring of iron levels
- Avoid excessive alcohol consumption
- Engage in regular physical activity
Blutwerte · Marker
Transferrinsättigung
Transferrin Saturation · TSAT · Iron Saturation
Eisen & AnämieNüchtern erforderlichZeitabhängig
- Einheit:
- fraction
- Abbreviation
- TSAT
Transferrin Saturation quantifies the percentage of transferrin that is bound with iron in the bloodstream.
Reference Ranges
Reference
0.2–0.5fraction
0.2
0.25
0.4
0.5
LowNormalHigh
Reference
Optimal
Unit · fractionRanges may vary slightly based on laboratory standards. Fasting and time of day can influence results.
Overview
Übersicht
Transferrin Saturation (TSAT) is a blood biomarker that reflects the proportion of transferrin, a plasma protein, that is saturated with iron. It is a crucial indicator of iron metabolism, providing insights into the balance between iron supply and demand in the body. Clinically, TSAT is important for diagnosing conditions related to iron overload, such as hereditary hemochromatosis, and iron deficiency disorders. Elevated TSAT levels are often associated with iron overload conditions, while low levels suggest iron deficiency or anemia. For athletes and biohackers, maintaining optimal TSAT levels is essential as both iron deficiency and overload can impair physical performance and recovery. Iron plays a vital role in oxygen transport and energy metabolism, making TSAT a marker of interest in these communities. However, researchers have observed that TSAT levels can be influenced by factors such as inflammation, infection, and liver disease, which can confound the interpretation of results. Additionally, fasting status and time of day may affect TSAT measurements, necessitating standardized testing conditions to ensure accurate assessment.
Klinische Bedeutung
Elevated TSAT values indicate potential iron overload conditions such as hereditary hemochromatosis. Reduced TSAT values suggest iron deficiency or anemia, which may require further investigation to determine the underlying cause.
Dynamics
Trend Interpretation
Rising Values
Progressively rising TSAT values suggest increasing iron overload risk. Re-test in 4 weeks if outside optimal range.
Falling Values
Progressively falling TSAT values may indicate worsening iron deficiency.
Re-test Interval
4 weeks if outside optimal range
Etiology
Causes — High & Low
Cause
Elevated Levels
- Hereditary hemochromatosis
- Iron supplementation
- Chronic liver disease
- Repeated blood transfusions
- Non-HFE hemochromatosis
Cause
Low Levels
- Iron deficiency anemia
- Chronic blood loss
- Malnutrition
- Chronic kidney disease
- Inflammatory conditions
Protocol
How to Optimize
Lever
Nutrition
- Consume iron-rich foods
- Include vitamin C to enhance iron absorption
- Limit intake of high-calcium foods with iron meals
Lever
Supplementation
- Iron supplements if deficient
- Vitamin C to enhance absorption
Note:
Consult a physician before starting iron supplementation, especially if iron overload is suspected.
Testing Guidelines
🍽️Fasting Required
🕐Time-Sensitive
Draw blood in the morning after fasting for consistent results.
Testing Frequency
Annually for healthy adults, more frequently if managing iron-related conditions.
Interfering Factors
- Inflammation
- Recent blood transfusion
- Liver disease
Related Peptides & Hormones
Hepcidin
hormoneMay affect
Open Research Questions
Current research suggests that the interpretation of transferrin saturation (TSAT) is complicated by confounders such as inflammation and metabolic abnormalities, and researchers have not yet established optimal reference ranges for different populations. Emerging research directions include exploring the link between TSAT levels and cardiovascular mortality, while unanswered clinical questions remain regarding the role of TSAT in risk stratification and the impact of iron status on various disease outcomes.
23 Research Publications
587
Total Citations
7
Human/RCT
4.3
Avg. Influence
2025
Latest
Sort
Filter
01Top
#01
Cirrhosis: Diagnosis and Management.
ReviewInfluence12.0
203
This study examined the diagnosis and management of cirrhosis, highlighting that early cirrhosis may be reversible. Researchers found that transferrin saturation is part of the initial workup for cirrhosis, along with other tests. The study emphasizes the importance of noninvasive tests in assessing liver fibrosis.
02Top
#02
Transferrin Saturation: A Body Iron Biomarker.
Elsayed M E, et al. · Advances in clinical chemistry · 2016
ReviewInfluence8.0
122
Researchers found that transferrin saturation (TSAT) is an important biomarker for assessing body iron status, linking it to various health outcomes. The study discusses the increasing use of TSAT in clinical practice while cautioning about its limitations, particularly in inflammatory conditions. The potential for TSAT to aid in risk stratification is also highlighted.
Key findings
- 01TSAT is a key indicator of body iron status, reflecting both plasma iron and its transport protein.
- 02The test's accuracy can be affected by conditions like inflammation, leading to potential misinterpretations.
- 03There is growing evidence that TSAT levels may be associated with cardiovascular health risks.
03Top
#03
Diagnosing iron deficiency: Controversies and novel metrics.
ReviewInfluence4.0
56
This review examined the diagnostic challenges of iron deficiency, discussing established and novel biomarkers including transferrin saturation. Researchers found that accurate diagnosis is crucial for effective management of anemia and related conditions. The study highlights the need for improved understanding and methodologies in diagnosing iron metabolism issues.
04
#04
Diagnosis of hyperferritinemia in routine clinical practice.
ReviewInfluence3.0
39
This study examined the diagnostic process for hyperferritinemia, highlighting the role of transferrin saturation in identifying potential causes. Researchers found that elevated transferrin saturation could indicate hereditary hemochromatosis. The study proposed a structured approach to diagnosing the underlying causes of hyperferritinemia.
05
#05
Changes in micronutrient and inflammation serum biomarker concentrations after a norovirus human challenge.
Human
38
This study investigated the impact of norovirus infection on micronutrient and inflammation biomarkers. Researchers observed that transferrin saturation levels decreased during inflammation caused by the infection. The findings suggest the need to adjust nutritional assessments based on inflammatory status.
06
#06
Iron and iron-related proteins in alcohol consumers: cellular and clinical aspects.
Review
24
Researchers observed that alcohol consumption can alter iron and related protein levels, complicating the diagnosis of alcohol-associated liver disease. The study highlighted variations in transferrin saturation and other iron parameters among alcohol consumers. It emphasized the need for careful evaluation of these biomarkers in clinical settings.
07
#07
Iron deficiency in pulmonary vascular disease: pathophysiological and clinical implications.
Human
20
In patients with pulmonary vascular disease, researchers observed that defining iron deficiency using transferrin saturation levels provided better insights into exercise capacity and clinical outcomes. A TSAT threshold of <21% was linked to worse functional status and increased mortality risk.
08
#08
Hereditary Hyperferritinemia.
Review
20
Researchers found that serum ferritin is a useful marker for assessing iron storage, but its interpretation can be complicated by various factors. This study focused on hereditary hyperferritinemia, discussing forms with normal transferrin saturation and the need for a thorough diagnostic approach. The review highlights the complexity of iron metabolism and its clinical implications.
09
#09
Markers of Iron Metabolism and Outcomes in Patients with Heart Failure: A Systematic Review.
Systematic Review
19
This systematic review found that iron deficiency in heart failure patients is linked to poorer health outcomes. Researchers noted that transferrin saturation is a significant predictor of all-cause mortality and hospitalizations, emphasizing the need for careful assessment of iron status in these patients.
10
#10
Primary Non-HFE Hemochromatosis: A Review.
ReviewInfluence1.0
13
This review examined non-HFE hemochromatosis, which is rare but can cause significant iron overload. Researchers found that diagnosis involves ruling out HFE mutations and evaluating transferrin saturation among other tests. The study underscores the importance of early diagnosis and treatment to prevent chronic liver disease.
Publication Trend
Research publications about Transferrinsättigung over time
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