Researchers affiliated with Zhejiang University School of Medicine have determined that switching from animal fats to vegetable oils can lower the probability of older adults developing dementia. The findings of this study were published in the journal The American Journal of Clinical Nutrition (AJCN).
Dementia constitutes a progressive brain ailment characterized by a decline in recollection, thought processes, and reasoning capabilities. Given the current lack of an effective cure, scientists are intensely investigating lifestyle elements that might mitigate the chances of this condition manifesting.
The investigative team examined data encompassing nearly six thousand participants enrolled in the American Health and Retirement Study. At the commencement of the observation period in 2013, the volunteers’ average age was roughly 68 years. The scientists scrutinized each subject’s dietary intake utilizing a comprehensive questionnaire that itemized 164 different food items.
Over a six-year span, the researchers monitored the participants’ cognitive status by consulting relatives and administering assessments targeting memory and attention. During this timeframe, 444 individuals were diagnosed with dementia.
The analysis indicated that individuals whose diets featured a substantial amount of plant-based fats—such as those derived from vegetable oils and nuts—faced a 31% lower risk of developing dementia compared to those who consumed the least amounts. Specifically, substituting just 5% of daily calories obtained from animal fats with plant-based alternatives brought about an approximate 15% reduction in the disease risk.
Furthermore, the scientists uncovered a correlation between high intake of saturated fats, typically found in meat and dairy products, and an elevated risk of the illness. Those with the highest recorded consumption of these fats exhibited a 56% greater likelihood of developing dementia.
The researchers suggest that this potential association might be rooted in how fats influence inflammation and vascular health. Saturated fats possess the potential to impair the function of blood vessels, including the tiny vessels within the brain responsible for supplying it with oxygen and vital nutrients. Conversely, monounsaturated and polyunsaturated fats, characteristic of vegetable oils and fish, are likely to support the integrity of the circulatory system.
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