Omega-3s are a family of polyunsaturated fatty acids that the body cannot produce on its own. That means they must come from healthy foods or supplementation.
Few nutrients have earned their reputation as consistently as omega-3 fatty acids. Decades of research across cardiovascular medicine, neuroscience, and cellular biology point to the same conclusion: these fats matter, and most people are not getting enough of them.
The three most important forms are ALA (alpha-linolenic acid), found in plant sources like flaxseed and walnuts; EPA (eicosapentaenoic acid); and DHA (docosahexaenoic acid), both of which are concentrated in fatty fish like salmon, sardines, and mackerel.
DHA is particularly significant for brain health. It makes up a large portion of the brain’s structural fat and plays an ongoing role in cognitive function, mood regulation, and neurological development at every stage of life. EPA, meanwhile, is closely tied to the body’s inflammatory response, making omega-3s a cornerstone of any anti-inflammatory approach to eating.
For heart health, omega-3s help support healthy triglyceride levels, blood pressure, and arterial flexibility. At the cellular level, they contribute to the integrity of cell membranes, which affects how efficiently cells communicate and absorb nutrients.
Those following a plant-based diet may need to pay extra attention here, since ALA converts to EPA and DHA only in small amounts. An algae-based omega-3 supplement can be a practical and sustainable alternative.