Omega-3 fatty acids are commonly associated with heart health, but their potential role in brain health may be equally significant, according to a report by registered dietitian nutritionist Molly Knudsen, M.S., RDN. The report, published Aug. 19, 2026, stated that DHA, an omega-3 found in fatty fish, is a major structural component of the brain, and it noted growing interest in the relationship between omega-3s and cognitive decline. A separate report analyzing multiple clinical trials and population studies found that increasing intake of omega-3 fatty acids is associated with significant reductions in heart disease risk and cognitive decline among women over 40 [1].
Knudsen described omega-3s as an under-consumed nutrient. Omega-3 fats are essential polyunsaturated fats required for healthy digestion, muscle activity, blood clotting, visual acuity, and memory, and most omega-3s must be obtained from the diet because the body cannot produce them, according to an article published by Mercola.com [2]. The report said most people can begin by increasing intake through food.
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