Fish Oil (2015) & Alzheimer's
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The researchers investigated whether fish oil supplementation would support cognitive capacity and slow brain atrophy in aged patients. They evaluated more than 800 patients, 229 with normal cognitive capacity, 397 with mild impairment, and 193 with Alzheimer's disease. Patients were tested using standard neuropsychological testing and brain MRI's at 6 months intervals over a 4 year period - in order to determine patients' ability to retain information and the size (volume) of the brain (cerebral cortex, hippocampus, ventricular volumes).
The researchers reported that taking fish oil supplements correlated with better standard memory and cognitive ability, and with less brain shrinkage - a tangible result of the development of Alzheimer's.
The benefit of fish oil supplements was most evident in the normal test group suggesting that the DHA omega-3 fatty acid is helpful for protecting the brain's health in later life.
The study did not specify the dosage, but the World Health Organization recommends EPA and DHA dosages of 300mg to 500mg daily and ALA of 800mg to 1100mg daily.
Researchers: L.A. Daiello, A. Gongvatana, S. Dunsiger, R.A. Cohen, B.R. Ott
Published: Association of fish oil supplement use with preservation of brain volume and cognitive function, Alzheimer's & Dementia: The Journal of the Alzheimer's Association, February, 2015.