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MIND diet associated with better cognitive functioning in elderly: Study
Aging takes a toll on the body and on the mind. The neurodegeneration menifests in form of tissue of aging human brains sometimes developing abnormal clumps of proteins that are the hallmark of Alzheimer's disease. Can brain be prevented from these effects of aging?
Researchers at Rush Institute for Healthy Aging, Rush University Medical Center, Chicago, IL, USA have found in a new study that people who consumed specific diet called the MIND diet moderately later in life did not have cognition problems.
They found that older adults may benefit from MIND diet even when they develop these protein deposits, known as amyloid plaques and tangles. Plaques and tangles are a pathology found in the brain that build up in between nerve cells and typically interfere with thinking and problem-solving skills.
MIND diet is a hybrid of the Mediterranean and DASH (Dietary Approaches to Stop Hypertension) diets. Previous research studies have found that the MIND diet may reduce a person's risk of developing Alzheimer's disease dementia.
The new study has been published in the Journal of Alzheimer's Disease.
"Some people have enough plaques and tangles in their brains to have a postmortem diagnosis of Alzheimer's disease, but they do not develop clinical dementia in their lifetime," said Klodian Dhana, MD, PhD, lead author of the paper and an assistant professor in the Division of Geriatrics and Palliative Medicine in the Department of Internal Medicine at Rush Medical College .
"Some have the ability to maintain cognitive function despite the accumulation of these pathologies in the brain, and our study suggests that the MIND diet is associated with better cognitive functions independently of brain pathologies related to Alzheimer's disease.
In this study, the researchers examined the associations of diet—from the start of the study until death—brain pathologies and cognitive functioning in older adults who participated in the Rush Alzheimer's Disease Center's ongoing Memory and Aging Project, which began in 1997 and includes people living in greater Chicago. The participants were mostly white without known dementia, and all of them agreed to undergo annual clinical evaluations while alive and brain autopsy after their death.
The researchers followed 569 participants, who were asked to complete annual evaluations and cognitive tests to see if they had developed memory and thinking problems. Beginning in 2004, participants were given an annual food frequency questionnaire about how often they ate 144 food items in previous year.
Using the questionnaire answers, the researchers gave each participant a MIND diet score based on how often the participants ate specific foods. The MIND diet has 15 dietary components, including 10 "brain-healthy food groups" and five unhealthy groups — red meat, butter and stick margarine, cheese, pastries and sweets, and fried or fast food.
To adhere to and benefit from the MIND diet, a person would need to eat at least three servings of whole grains, a green leafy vegetable and one other vegetable every day — along with a glass of wine — snack most days on nuts, have beans every other day or so, eat poultry and berries at least twice a week and fish at least once a week. A person also must limit intake of the designated unhealthy foods, limiting butter to less than 1 1/2 teaspoons a day and eating less than a serving a week of sweets and pastries, whole fat cheese, and fried or fast food.
Based on the frequency of intake reported for the healthy and unhealthy food groups, the researchers calculated the MIND diet score for each participant across the study period. An average of the MIND diet score from the start of the study until the participant's death was used in the analysis to limit measurement error. Seven sensitivity measures were calculated to confirm accuracy of the findings.
"We found that a higher MIND diet score was associated with better memory and thinking skills independently of Alzheimer's disease pathology and other common age-related brain pathologies. The diet seemed to have a protective capacity and may contribute to cognitive resilience in the elderly." Dhana said.
"Diet changes can impact cognitive functioning and risk of dementia, for better or worse," he continued. "There are fairly simple diet and lifestyle changes a person could make that may help to slow cognitive decline with aging, and contribute to brain health."
https://content.iospress.com/articles/journal-of-alzheimers-disease/jad210107
Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email:Â editorial@medicaldialogues.in. Contact no. 011-43720751
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751