Omega-3 fatty acids are a well-known nutrient, found in various cold-water fish (such as tuna, mackerel and sardines), nuts and leafy vegetables. It is often said how they are ‘good for your brain’, but is this true? How exactly do they improve cognitive health and wellbeing? A study published on 5th October provides insight into the impact on the brain areas and neurotransmitters involved in memory, learning and mood.