Fish really is 'brainfood' and eating it can make you smarter, researchers say.
Scientists discovered that eating food rich in omega-3 boosted blood flow to the brain and improved its performance during mental tasks.
The findings could have implicatons for treating dementia.
The health benefits of omega-3, found in oily fish, are already well known.
New research now claims it can also improve reaction times, as well as reducing levels of tiredness in the brain after performing tough tasks.
And the British researchers say the findings could be particularly important for older people, with a diet rich in omega-3 having the potential to stave off dementia.