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Blutwerte · Marker
Omega-3-Index
Omega-3 Index · EPA+DHA Index · Fatty Acid Status
Vitamine & Nährstoffe
- Einheit:
- %
- Abbreviation
- Omega-3 Index
The Omega-3 Index quantifies the percentage of EPA and DHA in red blood cell membranes.
Reference Ranges
Reference
4–8%
4
8
11
8
LowNormalHigh
Reference
Optimal
Unit · %Ranges apply to both sexes; fasting not required.
Overview
Übersicht
The Omega-3 Index (O3I) is a biomarker that measures the percentage of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the red blood cell (RBC) membranes. This index reflects the long-term intake of omega-3 fatty acids, which are crucial components of cell membranes and play a significant role in anti-inflammatory processes and cardiovascular health. Clinically, a higher Omega-3 Index is associated with reduced risk of coronary heart disease (CHD) and sudden cardiac death, while a lower index is linked to increased mortality and various cognitive impairments. The index is considered optimal between 8-11%, providing the greatest cardioprotective benefits. For athletes, maintaining an optimal Omega-3 Index can enhance cardiovascular health, improve recovery, and prevent injuries. It is also gaining interest in sports medicine as a marker for performance optimization. However, factors such as dietary intake, genetic variations, and metabolic conditions can influence the Omega-3 Index. Researchers recommend standardized testing methods to ensure accurate assessment, and note that fasting is not required for this test.
Klinische Bedeutung
Elevated Omega-3 Index values (>8%) indicate a reduced risk of coronary heart disease and sudden cardiac death. Reduced values (≤4%) are associated with increased mortality risk, cognitive decline, and psychiatric disorders.
Dynamics
Trend Interpretation
Rising Values
Progressively rising values suggest improved cardiovascular and cognitive health. Retest in 6 months to confirm stability.
Falling Values
Progressively falling values may indicate increased cardiovascular risk or dietary insufficiency.
Re-test Interval
6 months if outside optimal range
Etiology
Causes — High & Low
Cause
Elevated Levels
- High intake of fish oil supplements
- Diet rich in fatty fish
- Genetic predisposition
- High adherence to Mediterranean diet
Cause
Low Levels
- Low dietary intake of omega-3s
- High intake of omega-6 fatty acids
- Poor absorption of fats
- Metabolic disorders
Protocol
How to Optimize
Lever
Nutrition
- Consume more fatty fish
- Include flaxseeds and walnuts
- Use algae oil
Lever
Supplementation
- Fish oil supplements
- Algal DHA supplements
- Krill oil
Note:
Consult a healthcare provider before starting any supplementation, especially if on medication.
Testing Guidelines
✓Fasting Not Required
✓Not Time-Sensitive
Testing Frequency
Annually for general health monitoring, more frequently if adjusting diet or supplementation.
Interfering Factors
- Recent dietary changes
- Genetic variations in metabolism
- Certain medications
Open Research Questions
Current research suggests that optimal Omega-3 Index targets remain debated, with varying reference ranges (2-20%) and an ideal range of 8-11% not universally accepted. Researchers have not yet established the influence of dietary confounders on Omega-3 Index levels across diverse populations. Additionally, clinical questions remain unanswered regarding the specific mechanisms by which the Omega-3 Index affects cardiovascular health and cognitive function, particularly in at-risk populations.
37 Research Publications
2,189
Total Citations
24
Human/RCT
8.3
Avg. Influence
2024
Latest
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Filter
01Top
#01
The Omega-3 Index: a new risk factor for death from coronary heart disease?
HumanInfluence96.0
1147
This study proposed the Omega-3 Index as a new risk factor for coronary heart disease (CHD). Researchers found that higher O3I levels were inversely associated with CHD mortality, with an O3I of over 8% providing the greatest protection. The findings suggest that the Omega-3 Index could serve as a clinically useful biomarker for assessing CHD risk.
02Top
#02
Importance of EPA and DHA Blood Levels in Brain Structure and Function.
von Schacky Clemens · Nutrients · 2021
ReviewInfluence6.0
150
Researchers examined the relationship between blood levels of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and brain health. They found that lower Omega-3 Index levels were linked to increased risks of mortality, cognitive decline, and psychiatric disorders. The study suggests that measuring the Omega-3 Index could guide future clinical trials and dietary recommendations.
Key findings
- 01Researchers observed that adequate blood levels of EPA and DHA are essential for brain health.
- 02Researchers found that dietary intake significantly affects the levels of these fatty acids in the blood.
- 03Researchers noted that the HS-Omega-3 Index is a reliable method for assessing EPA and DHA levels.
03Top
#03
The omega-3 index: clinical utility for therapeutic intervention.
ReviewInfluence8.0
143
Researchers highlighted the clinical significance of the Omega-3 Index in assessing cardiovascular risk. They noted that low levels of EPA and DHA in red blood cells are linked to increased sudden cardiac death risk. The study advocated for the use of O3I in clinical practice for better patient care.
04
#04
The omega-3 index: from biomarker to risk marker to risk factor.
ReviewInfluence8.0
136
Researchers reviewed the Omega-3 Index as a potential risk marker for coronary heart disease. They found that lower Omega-3 levels correlate with increased risk for sudden cardiac death, fulfilling many criteria for a risk factor. The study emphasized the importance of O3I in cardiovascular health assessments.
05
#05
Omega-3 world map: 2024 update.
Schuchardt Jan Philipp, et al. · Progress in lipid research · 2024
ReviewInfluence9.0
94
This study updated the global Omega-3 Index (O3I) map, revealing that most countries have low to very low O3I levels. Researchers found notable improvements in countries like the USA and Canada, while others like Iran and India showed particularly poor levels. The study included data from 328 studies with over 342,000 subjects across 48 countries.
Key findings
- 01Researchers observed that the USA, Canada, Italy, Turkey, UK, Ireland, and Greece improved from very low to low omega-3 levels.
- 02Researchers noted that France, Spain, and New Zealand moved from low to moderate levels.
- 03Researchers found that countries like Iran, Egypt, and India had particularly poor omega-3 levels.
06
#06
Red blood cell PUFAs reflect the phospholipid PUFA composition of major organs.
AnimalInfluence1.0
80
This study examined the relationship between red blood cell (RBC) fatty acids and the fatty acid composition of major organs in mice. Researchers found that RBCs, heart, muscle, spleen, lung, and adipose tissues showed strong correlations in their omega-3 and omega-6 fatty acid profiles in response to dietary supplementation with EPA and DHA. This suggests that the omega-3 index in RBCs may reflect fatty acid levels in other tissues.
07
#07
Cardiovascular risk and the omega-3 index.
HumanInfluence5.0
53
Researchers proposed the Omega-3 Index as a potential risk factor for sudden cardiac death (SCD), noting a steep dependence of SCD risk on O3I levels. The study supports dietary intake of EPA and DHA to reduce SCD incidence and highlights the index's utility in assessing cardiovascular risk.
08
#08
Is the omega-3 index a valid marker of intestinal membrane phospholipid EPA+DHA content?
AnimalInfluence1.0
47
Researchers investigated the correlation between the Omega-3 Index and EPA+DHA content in gastrointestinal tissues. They found strong correlations between O3I and tissue levels after dietary supplementation in mice, suggesting that the Omega-3 Index is a valid biomarker for assessing dietary EPA+DHA incorporation into GI tissues.
09
#09
Monitoring Blood Biomarkers and Training Load Throughout a Collegiate Soccer Season.
HumanInfluence4.0
42
10
#10
Associations Between Whole Blood and Dietary Omega-3 Polyunsaturated Fatty Acid Levels in Collegiate Athletes.
HumanInfluence1.0
34
Researchers assessed dietary and whole blood omega-3 levels among collegiate athletes. They found that the omega-3 index was relatively low, with dietary intakes of omega-3 fatty acids below recommended levels. The study suggests that a questionnaire may help identify athletes at risk for low omega-3 status, particularly among females.
Clinical Trials (5)
5
Total Trials
985
Total Enrolled
Evaluation of the Nutritional Status of Omega-3 Fatty Acids and the Possible Influences of Dietary Patterns and Different Socioeconomic Factors, in a Spanish Population Over 60 Years of Age
NCT06916455RECRUITING
Sponsor
Universidad de Granada
Enrollment
800
Started
2025
Primary outcome
omega-3 index
Fatty Acids, Omega-3
Omega-3 Fatty Acid Lipidomics in Diabetes Peripheral Neuropathy
Sponsor
University of Iowa
Enrollment
100
Started
2023
Primary outcome
Change from baseline of omega-3 index at 16 and 24 weeks
Diabetic Neuropathies
Effect of Fish Oil Monoglycerides on the Omega-3 Index
Sponsor
Samuel Fortin
Enrollment
32
Started
2018
Primary outcome
Measurement of the Omega-3 index over time to establish the Pharmacokinetic curve and bioavailability at steady state.
Pharmacokinetic in Normal Population
Study Comparing Fish Oil and Krill Oil
NCT02670356TERMINATED
Sponsor
Tufts University
Enrollment
2
Started
2015
Primary outcome
Omega-3 index
InflammationDyslipidemia
Farmed Fish Human Intervention Study
NCT01916434COMPLETED
Sponsor
University of Aberdeen
Enrollment
51
Started
2013
Primary outcome
Change in the omega-3 index
Cardiovascular Disease
Publication Trend
Research publications about Omega-3-Index over time
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