Cross-sectional study of the combined associations of dietary and supplemental eicosapentaenoic acid + docosahexaenoic acid on Omega-3 Index
Nutrition Research. Available online 11 September 2019 https://doi.org/10.1016/j.nutres.2019.09.001
Sharon L.McDonnell a Christine B.French a Carole A.Baggerly a William S.Harris bc
Grassroots Health highlights of their study
- Omega-3 – Chart of index vs ratio by GrassrootsHealth – Sept 2019
- Omega-3 index - good level needed 2.4 grams of regular Omega-3 - Grassroots Nov 2018
- Omega-3 index of 6 to 7 associated with best cognition in this study – Nov 2019
- Omega-3 index - many studies
- Omega-3 index replaces the Omega-6 to Omega-3 ratio – March 2018
- No NCAA player had a healthy Omega-3 index – Jan 2019
- NCAA trainers do not appear to have gotten on board the Omega-3 train yet
- NCAA trainers are getting on board the Vitamin D train (40-50 ng)– Nov 2019
- Omega-3 index of 5 greatly decreases the risk of an early preterm birth – Dec 2018
Vitamin D and Omega-3 category starts with
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Studies have linked an Omega-3 Index (O3I), which measures eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA) in red blood cell membranes, of ≥8% with improved health. Previous studies found that the American Heart Association (AHA) recommendation of 1-2 seafood meals per week does not achieve an O3I ≥8% even with an EPA + DHA supplement; however, these studies did not assess the frequency or amount of supplemental intake. Among participants in a predominantly US and Canadian cohort with high nutrient supplement use, we hypothesized that those adhering to the AHA guidelines would not have an average O3I ≥8% but that those taking a daily supplement would. Fish consumption and EPA + DHA supplement use were reported by 1795 participants; 985 also completed a blood spot test for O3I. A majority (71%) consumed <2 servings per week of fatty fish, and 61% took an EPA + DHA supplement. The amount of EPA + DHA for 1 serving (based on the product label) significantly differed among the >400 supplement products (50-3570 mg). O3I was ≥8.0% in 19% of participants. Among non–supplement takers, 3% of those consuming 1 fish serving per week and 17% consuming ≥2 achieved an O3I ≥8.0%. Among those consuming ≥2 fish servings per week, only those also taking an average of 1100 mg/d of supplemental EPA + DHA had a median O3I ≥8.0%. Based on the relationship between supplemental EPA + DHA intake and O3I for non–fish eaters (R2 = 0.40, P < .0001), an average of ~1300 mg/d of EPA + DHA achieved an O3I of 8.0%. This study suggests that following the AHA guidelines does not produce an O3I ≥8% nor does taking 1 serving per day of most omega-3 supplements.
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