Summary: A new study finds that specific nutrients, similar to those found in the Mediterranean diet, may play a crucial role in slowing down brain aging. The study combined blood biomarker analysis, brain imaging, and cognitive assessments to identify a nutrient profile associated with slower brain aging in cognitively healthy older adults.
These findings suggest that a diet rich in fatty acids, antioxidants, carotenoids, vitamin E, and choline could promote healthy brain aging and cognitive function.
Key Facts:
- A specific nutrient profile is associated with slower brain aging in older adults.
- This profile aligns with nutrients found in the Mediterranean diet.
- The study combined blood biomarkers, brain imaging, and cognitive assessments.
Source: University of Nebraska Lincoln
Scientists have long been studying the brain with a goal of aiding healthier aging. While much is known about risk factors for accelerated brain aging, less has been uncovered to identify ways to prevent cognitive decline.
There is evidence that nutrition matters, and a novel study published in Nature Publishing Group Aging, from the University of Nebraska–Lincoln’s Center for Brain, Biology and Behavior and the University of Illinois at Urbana-Champaign further signals how specific nutrients may play a pivotal role in the healthy aging of the brain.
The team of scientists, led by Aron Barbey, director of the Center for Brain, Biology and Behavior, with Jisheng Wu, a doctoral student at Nebraska, and Christopher Zwilling, research scientist at UIUC, performed the multimodal study — combining state-of-the-art innovations in neuroscience and nutritional science — and identified a specific nutrient profile in participants who performed better cognitively.
The cross-sectional study enrolled 100 cognitively healthy participants, aged 65-75. These participants completed a questionnaire with demographic information, body measurements and physical activity.
Blood plasma was collected following a fasting period to analyze the nutrient biomarkers. Participants also underwent cognitive assessments and MRI scans. The efforts revealed two types of brain aging among the participants — accelerated and slower-than-expected. Those with slower brain aging had a distinct nutrient profile.
The beneficial nutrient blood biomarkers were a combination of fatty acids (vaccenic, gondoic, alpha linolenic, elcosapentaenoic, eicosadienoic and lignoceric acids); antioxidants and carotenoids including cis-lutein, trans-lutein and zeaxanthin; two forms of vitamin E and choline.
This profile is correlated with nutrients found in the Mediterranean diet, which research has previously associated with healthy brain aging.
“We investigated specific nutrient biomarkers, such as fatty acid profiles, known in nutritional science to potentially offer health benefits. This aligns with the extensive body of research in the field demonstrating the positive health effects of the Mediterranean Diet, which emphasizes foods rich in these beneficial nutrients,” Barbey, Mildred Francis Thompson Professor of Psychology, said.
“The present study identifies particular nutrient biomarker patterns that are promising and have favorable associations with measures of cognitive performance and brain health.”
Barbey noted that previous research on nutrition and brain aging has mostly relied on food frequency questionnaires, which are dependent on participants’ own recall. This study is one of the first and the largest to combine brain imaging, blood biomarkers and validated cognitive assessments.
“The unique aspect of our study lies in its comprehensive approach, integrating data on nutrition, cognitive function, and brain imaging,” Barbey said.
“This allows us to build a more robust understanding of the relationship between these factors. We move beyond simply measuring cognitive performance with traditional neuropsychological tests.
“Instead, we simultaneously examine brain structure, function, and metabolism, demonstrating a direct link between these brain properties and cognitive abilities. Furthermore, we show that these brain properties are directly linked to diet and nutrition, as revealed by the patterns observed in nutrient biomarkers.”
The researchers will continue to explore this nutrient profile as it relates healthy brain aging. Barbey said it’s possible, in the future, that the findings will aid in developing therapies and interventions to promote brain health.
“An important next step involves conducting randomized controlled trials. In these trials, we will isolate specific nutrients with favorable associations with cognitive function and brain health, and administer them in the form of nutraceuticals,” Barbey said.
“This will allow us to definitively assess whether increasing the levels of these specific nutrient profiles reliably leads to improvements in cognitive test performance and measures of brain structure, function, and metabolism.”
Barbey is also co-editing an upcoming special collection for the Journal of Nutrition, “Nutrition and the Brain — Exploring Pathways to Optimal Brain Health Through Nutrition,” which is currently inviting submissions for consideration, and articles will begin publishing next year.
“There’s immense scientific and medical interest in understanding the profound impact of nutrition on brain health,” Barbey said.
“Recognizing this, the National Institutes of Health recently launched a ten-year strategic plan to significantly accelerate nutrition research. Our work directly aligns with this critical initiative, aiming to contribute valuable insights into how dietary patterns influence brain health and cognitive function.”
About this diet and brain aging research news
Author: Leslie Reed
Source: University of Nebraska Lincoln
Contact: Leslie Reed – University of Nebraska Lincoln
Image: The image is credited to Neuroscience News
Original Research: Open access.
“Investigating nutrient biomarkers of healthy brain aging: a multimodal brain imaging study” by Aron Barbey et al. Nature Aging
Abstract
Investigating nutrient biomarkers of healthy brain aging: a multimodal brain imaging study
The emerging field of Nutritional Cognitive Neuroscience aims to uncover specific foods and nutrients that promote healthy brain aging.
Central to this effort is the discovery of nutrient profiles that can be targeted in nutritional interventions designed to promote brain health with respect to multimodal neuroimaging measures of brain structure, function, and metabolism.
The present study therefore conducted one of the largest and most comprehensive nutrient biomarker studies examining multimodal neuroimaging measures of brain health within a sample of 100 older adults.
To assess brain health, a comprehensive battery of well-established cognitive and brain imaging measures was administered, along with 13 blood-based biomarkers of diet and nutrition.
The findings of this study revealed distinct patterns of aging, categorized into two phenotypes of brain health based on hierarchical clustering.
One phenotype demonstrated an accelerated rate of aging, while the other exhibited slower-than-expected aging. A t-test analysis of dietary biomarkers that distinguished these phenotypes revealed a nutrient profile with higher concentrations of specific fatty acids, antioxidants, and vitamins.
Study participants with this nutrient profile demonstrated better cognitive scores and delayed brain aging, as determined by a t-test of the means.
Notably, participant characteristics such as demographics, fitness levels, and anthropometrics did not account for the observed differences in brain aging.
Therefore, the nutrient pattern identified by the present study motivates the design of neuroscience-guided dietary interventions to promote healthy brain aging.
