What it measures
Lipids Blood Tests
Clinical significance
The Omega-3 Index measures the amount of EPA and DHA in red blood cell membranes and serves as a marker of omega-3 status.
🔍 What is a normal Omega-3 Index?
How do you know if your omega-3 is low?
Is the Omega-3 Index a reliable biomarker?
While the omega-3 index is a reliable marker for assessing omega-3 status in general, it's important to note that there are other factors to consider when evaluating the impact of omega-3s on specific health outcomes. For example, the plasma BDNF (Brain-Derived Neurotrophic Factor)¹ has been shown to be a more reliable biomarker than the erythrocyte omega-3 index when assessing the effectiveness of omega-3 supplements in brain health (Sugasini et al., 2020).
Additionally, research indicates that higher levels of DHA in plasma phospholipids are associated with a more favorable cardiovascular disease (CVD) risk profile, including lower BMI and waist circumference, as well as better triglyceride and HDL-C levels. On the other hand, higher levels of DPA (Docosapentaenoic Acid) have been linked to a less favorable CVD risk profile (Garneau et al., 2013)².
In summary, while the Omega-3 Index is a useful tool for assessing overall omega-3 status, it should be complemented by other biomarkers, particularly when assessing brain or cardiovascular health.
References:
1. https://pubmed.ncbi.nlm.nih.gov/32616795/ 2. https://pubmed.ncbi.nlm.nih.gov/23537014/
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