Essential omega-3 fatty acids are called 'essential' because we can't make them ourselves and have to get them from food. These fats don't just come from fish. You can also find them in nuts, seeds, plant oils such as olive oil, some vegetables such as leafy greens, and grass-fed animal products.

EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) are two omega-3 fats that are specifically linked to brain health. DHA, in particular, is critical for healthy foetal development of the nervous system and eyes. It may also improve the hand-eye coordination of toddlers and potentially raise I.Q.s in children.

The problem is that the omega-3 fatty acid provided by plant foods and grass-fed animal fats comes in the form of ALA (alpha-linolenic acid). This has many health benefits, including energy production, but it has to convert to EPA and DHA in our bodies – and the conversion rate is relatively low.

Marine omega-3 fats are the most available source of EPA and DHA which our bodies don't have to convert. So, to ensure you and your children are getting enough EPA and DHA in your diets, you need to consume oily fish or fish oil supplements.