Disclosure: This post contains affiliate links. If you click and make a purchase, we may earn a small commission at no extra cost to you. We only recommend products we genuinely believe in. When my daughter was about 18 months I read something about omega 3 and brain development and immediately went into a mild panic about whether she was getting enough. She was not a fish eater. She had strong opinions about salmon, specifically that it was unacceptable. We worked around it. Omega 3 fatty acids, particularly DHA and EPA, are important for brain development, eye health, and immune function. Toddlers aged 1 to 3 need around 700mg of omega 3 per day. Oily fish is the richest source of DHA and EPA, the forms most useful to the body. Salmon, sardines, mackerel, and trout are all excellent sources. Even small amounts twice a week contribute significantly. Canned fish is a convenient and affordable option. Tinned salmon on toast, sardines mashed on crackers, or flaked into pasta sauce. Eggs enriched with omega 3, sometimes sold as omega 3 eggs, contain more DHA than standard eggs. Walnuts and walnut oil contain ALA, a plant-based omega 3 that the body can partially convert to DHA and EPA, though conversion is inefficient. Flaxseeds and chia seeds are also rich in ALA. Ground flaxseed can be added to porridge, yogurt, or smoothies invisibly. Edamame beans contain modest amounts of omega 3. For toddlers who genuinely will not eat fish, an omega 3 supplement designed for children is a reasonable option. Look for algae-based DHA supplements which are suitable for all diets including vegan, since the fish actually get their DHA from algae in the first place.