Researchers from the University
of Pittsburgh found that people who eat baked or broiled fish on a weekly basis
may be improving their brain health and lowering their risk of developing Mild
Cognitive Impairment (MCI) and Alzheimer’s disease. The results,
released at the annual meeting of the Radiological Society of North America established
a direct relationship between fish consumption, brain structure and Alzheimer's
risk.
The study determined that eating
baked or broiled fish once per week led to better preservation of gray matter
volume on MRI scans in brain areas at risk for Alzheimer's
disease. Health-minded people may be able to dramatically lower the risk of
developing this most feared memory-robbing illness.
Regular Fish Consumption Preserves Brain Volume and Cognitive Function
Dr. Cyrus Raji, M.D., Ph.D., from
the University of Pittsburgh Medical Center and the University of Pittsburgh
School of Medicine and his team developed a cohort of 260 cognitively normal
individuals. Information on fish consumption was gathered using the National
Cancer Institute Food Frequency Questionnaire. 163 participants consumed fish
on a weekly basis, and the majority ate fish one to four times per week.
Each subject was examined using a
3-D volumetric MRI scan of the brain to measure gray matter volume. The test
was used to model the relationship between weekly fish consumption at baseline
and brain structure after a period of ten years. Data was then analyzed to
determine if gray matter volume preservation associated with fish
consumption reduced the risk for Alzheimer's disease. The study controlled for
age, gender, education, race, obesity, physical activity, and the presence or
absence of apolipoprotein E4 (ApoE4), a gene that increases the risk of
developing Alzheimer's.
Eating Fatty Fish Once Per Week Preserves Cognitive Function
The findings showed that
consumption of baked or broiled fish on a weekly basis was positively
associated with gray matter volumes in several areas of the brain. Higher grey
matter brain volume correlates with increased cognitive function and is commonly
used to determine progression of degenerative conditions such as Alzheimer’s.
Maintaining grey matter volume over a five-year period lowers risk of
Alzheimer’s disease by five-fold.
Dr. Raji concluded
“Consuming baked or broiled fish promotes
stronger neurons in the brain's gray matter by making them larger and
healthier… this simple lifestyle choice increases the brain's resistance to
Alzheimer's disease and lowers risk for the disorder.” Eating fatty fish at
least once per week (preferably at several meals) improves working memory and
allows people to focus on tasks that commit information to short-term memory,
improving cognitive function and lowering the risk from Alzheimer’s disease.