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.
They conducted two studies to investigate the effects of oily fish. Volunteers were given fish-oil supplements rich in DHA, an omega-3 fatty acid.
Results of one showed that taking omega-3 supplements during mental tasks boosted blood flow to active areas of the brain.
Another study looked at the impact of giving two fish-oil supplements to a group of volunteers aged 18-35 over three months.
Results, published in the British Journal of Nutrition, showed little difference in blood flow to the brain, but faster reaction times and lower levels of tiredness after being given a task to complete.
Continue reading at Telegraph.co.uk