Food sources richest in omega-3 fatty acids include fatty fish, flaxseeds, chia seeds, and walnuts. Fatty fish, such as salmon, mackerel, and sardines, are particularly high in the beneficial EPA and DHA forms of omega-3s. Flaxseeds and chia seeds are great plant-based sources, offering alpha-linolenic acid (ALA), which the body can convert to EPA and DHA, albeit inefficiently. Eating a mix of these foods regularly can significantly contribute to heart health, reduce inflammation, and support overall well-being.