What are omega-3s? Omega-3s are essential fatty acids. They play an important role in cellular function and in maintaining heart health, brain health, kidney function, eye health, and skin health. Are omega-3s found in plant foods? Omega-3 fatty acids are readily available in a wide variety of plant foods. Sources include walnuts, flaxseeds, chia seeds, hemp seeds, edamame, seaweed, and …