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A diet created by researchers at Rush University Medical Center may help substantially slow cognitive decline in stroke survivors, according to preliminary research to the general population. The diet, known as the MIND diet, is short for Mediterranean-DASH Diet Intervention for Neurodegenerative Delay. The diet is a hybrid of the Mediterranean and DASH (Dietary Approaches to Stop Hypertension) diets. Both have been found to reduce the risk of cardiovascular conditions such as hypertension, heart attack and stroke.
The foods that promote brain health, including vegetables, berries, fish and olive oil, are included in the MIND diet, the diet has slow cognitive decline in stroke survivors. MIND diet based on information from years of research about what foods and nutrients have good, and bad, effects on the functioning of the brain. The diet has been associated with reduced Alzheimer’s risk in seniors who adhered to its recommendations. Even people who moderately adhered had reduced risk of Alzeimeir’s disease D and cognitive decline.
The MIND diet has 15 dietary components, including 10 “brain-healthy food groups” and five unhealthy groups-red meat, butter, cheese, pastries and sweets, and fried or fast food. To 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. The diet also specifies limiting intake of the designated unhealthy foods, limiting butter to less than half teaspoons a day and eating less than 5 servings a week of sweets and pastries, and less than one serving per week of whole fat cheese, and fried or fast food.
From 2004 to 2017, Cherian and colleagues studied 106 participants of the Rush Memory and Aging Project who had a history of stroke for cognitive decline, including decline in one’s ability to think, reason and remember. They assessed people in the study every year until their deaths or the study’s conclusion, for an average of 5.9 years, and monitored patients’ eating habits using food journals.
The researchers grouped participants into those who were highly adherent to the MIND diet, moderately adherent and least adherent. They also looked at additional factors that are known to affect cognitive performance, including age, gender, education level, participation in cognitively stimulating activities, physical activity, smoking and genetics.
The study participants whose diets scored highest on the MIND diet score had substantially slower rate of cognitive decline than those who scored lowest. The estimated effect of the diet remained strong even after taking into account participants’ level of education and participation in cognitive and physical activities. In contrast to the results of slower decline with higher MIND diet score, stroke survivors who scored high on the Mediterranean and DASH diets, did not have significant slowing in their cognitive abilities.
The Mediterranean and DASH diets have been shown to be protective against coronary artery disease and stroke, but it seems the nutrients emphasized in the MIND diet may be better suited to overall brain health and preserving cognition. According to Cherian, studies have found that folate, vitamin E, omega-3 fatty acids, carotenoids and flavonoids are associated with slower rates of cognitive decline, while substances such as saturated and hydrogenated fats have been associated with dementia.
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