“…why is it that a new study of older women published in the journal Neurology finds that omega-3s may not benefit thinking skills or help fend off cognitive decline?…As study author Eric Ammann, of the University of Iowa, points out in an email, “most randomized trials of omega‑3 supplements have not found an effect on cognitive function.”
“When you eat fish, there are other nutrients such as vitamin E or vitamin D” that you’re getting at the same time, says researcher Rosebud Roberts of the Mayo Clinic. In other words, it’s the whole food, as a package, that may be beneficial. And this seems to be the general picture emerging in human health: getting nutrients and healthful fats from the foods we eat as part of a healthful diet, rather than from supplements, may be the way to go.”
Study: Omega‑3 fatty acids and domain-specific cognitive aging (Neurology). From the Abstract:
- Objective: To test the hypothesis that higher levels of red blood cell (RBC) docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) have a protective association with domain-specific cognitive function in women aged 65 years and older.
- Results: After adjustment for demographic, clinical, and behavioral characteristics, no significant cross-sectional cognitive differences were found between women in the high and low DHA + EPA tertiles at the time of the first annual cognitive battery. In addition, no significant differences were found between the high and low DHA + EPA tertiles in the rate of cognitive change over time.
- Conclusions: We did not find an association between RBC DHA + EPA levels and age-associated cognitive decline in a cohort of older, dementia-free women.