---
title: "Ultra-processed foods linked to MRI signs of vascular brain injury in middle-aged adults"
id: "medical-news-today-0-ultra-processed-foods-may-be-harming-brain-health-in-otherwise-healthy-adults"
canonical_url: "https://medichelpline.com/clinical-feed/medical-news-today-0-ultra-processed-foods-may-be-harming-brain-health-in-otherwise-healthy-adults"
content_type: "clinical_feed_article"
specialty: "Neurology"
source_name: "Medical News Today"
source_url: "https://www.medicalnewstoday.com/articles/ultra-processed-foods-may-be-harming-brain-health-in-otherwise-healthy-adults/"
published_at: "2026-10-17T06:00:00.000Z"
evidence_level: "Verified Feed"
license: "CC-BY-NC-4.0 / Informational Use"
---
# Ultra-processed foods linked to MRI signs of vascular brain injury in middle-aged adults
## Provenance & Clinical Metadata
- **Canonical URL:** https://medichelpline.com/clinical-feed/medical-news-today-0-ultra-processed-foods-may-be-harming-brain-health-in-otherwise-healthy-adults
- **Specialty:** [Neurology](https://medichelpline.com/clinical-feed/neurology.md)
- **Primary Source:** Medical News Today
- **Source URL:** [Original Journal Publication](https://www.medicalnewstoday.com/articles/ultra-processed-foods-may-be-harming-brain-health-in-otherwise-healthy-adults/)
- **Published At:** 2026-10-17T06:00:00.000Z
- **Evidence Rating:** Verified Feed
## Executive GIST (TL;DR)
- Investigators analyzed data from nearly 9,000 Canadian adults aged 35–69 with no history of heart disease, using dietary questionnaires and brain MRI reviewed blind to diet. - The study team classified foods by industrial processing and measured MRI markers such as **white matter hyperintensities** and **silent brain infarcts**. - Participants in the highest ultra-processed food intake group had about a 40% higher likelihood of these MRI-detected vascular brain changes compared with those in the lowest intake group. - The association was stronger in females; women with the highest consumption were nearly twice as likely to show MRI evidence of brain injury versus women with the lowest consumption. - Higher UPF intake correlated with greater overall body fat and more deep abdominal (visceral) fat; those with high UPF intake also ate fewer fruits, vegetables, and whole grains. - Investigators emphasized the observational design: dietary data and MRI scans were cross-sectional, so temporal sequence and causation were not established. - The authors noted possible mechanisms (cardiometabolic risk, inflammation, vascular damage) but did not determine mediators such as body fat or inflammation. - The study did not report whether reducing UPF intake would prevent or reverse MRI findings; residual confounding and subgroup sample-size limits were acknowledged and require further prospective study.
## Clinical Analysis & Structured Key Points
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checked by Jill Seladi-Schulman, Ph.D. 20 tips to lose weight safely * **A study of Canadian adults suggests that those who consumed the most ultra-processed foods (UPFs) were 40% more likely to show small areas of brain damage on MRI scans than those who consumed the least.** * **The findings also indicate that females with the highest UPF intake were nearly twice as likely to show signs of brain damage as those with the lowest intake.** * **UPFs typically displaced healthier options, as those with higher intakes also ate fewer fruits, vegetables, whole grains, and other minimally processed foods.** * **The associated brain changes can be early indicators associated with an increased risk of stroke and future memory problems. However, the study cannot establish cause and effect, and further research is necessary.** Ultra-processed foods (UPFs), [such as](https://pmc.ncbi.nlm.nih.gov/articles/PMC10260459/) packaged snacks, sugary drinks, processed meats and many ready meals, often contain high levels of salt, sugar and unhealthy fats, alongside additives and ingredients designed to improve taste, texture and shelf life. Regularly consuming large amounts of UPFs has been associated with an increased risk of [obesity](https://pmc.ncbi.nlm.nih.gov/articles/PMC10924027/), [type 2 diabetesTrusted Source](https://www.thelancet.com/journals/lanepe/article/PIIS2666-7762\(24\)00210-2/fulltext), [cardiovascular disease](https://pmc.ncbi.nlm.nih.gov/articles/PMC8483964/) and other adverse health outcomes. **Now, research suggests that consuming high amounts of ultra-processed foods may be associated with signs of brain damage in otherwise healthy middle-aged adults.** The study, published in [JAMA Network OpenTrusted Source](https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2855351), found that participants with the highest UPF intake were 40% more likely to show certain brain changes on magnetic resonance imaging (MRI) scans than those with the lowest intake. These changes, which may occur without noticeable symptoms, can be early indicators of damage to small blood vessels in the brain and have been associated with an increased risk of [stroke](https://www.medicalnewstoday.com/articles/7624) and cognitive problems later in life. While further research is still necessary, the findings raise questions about how dietary habits during middle age may influence long-term brain health. ## Higher ultra-processed food intake linked to brain changes Researchers analyzed data from nearly 9,000 Canadian adults aged 35 to 69 who had no history of heart disease. Participants were enrolled into either the [Canadian Alliance for Healthy Hearts and Minds](https://www.phri.ca/research/cahhm/) or the [Prospective Urban and Rural Epidemiology-MIND study](https://www.phri.ca/research/pure/). Participants completed detailed dietary questionnaires and underwent MRI brain scans. Neurologists reviewed the scans without knowing the participants’ dietary habits. **The researchers classified foods according to the extent and purpose of the industrial processing used to produce them. The researchers found that participants who consumed the highest amounts of these foods were 40% more likely to have small areas of brain damage than those who consumed the least.** “The finding is concerning because the brain changes we studied are not considered benign,” [Russell de Souza](https://experts.mcmaster.ca/people/desouzrj), ScD, RD, first author of the study and an associate scientist at the Population Health Research Institute (PHRI) of McMaster University and Hamilton Health Sciences, told _Medical News Today_. “White matter hyperintensities and silent brain infarcts are [established markers](https://pmc.ncbi.nlm.nih.gov/articles/PMC8480402/) of cerebrovascular disease and have been associated in previous research with a higher risk of future stroke, cognitive decline, and dementia,” said de Souza. “That said, it is important to distinguish between relative risk and absolute risk. In our study, participants with the highest ultra-processed food intake had about a 40% higher likelihood of vascular brain injury compared with those with the lowest intake. However, because these MRI findings are relatively uncommon in middle-aged adults, that does not mean 40% of people will develop brain injury,” he explained. > “Put another way, if roughly 1 in 10 people had these MRI findings, a 40% relative increase would translate to about 14 in 100 people rather than 10 in 100 people. The individual increase in risk is modest, but because ultra-processed foods are consumed by a large proportion of the population, even modest increases in risk could have important implications at a population level.” > – Russell de Souza, ScD, RD “What makes the finding particularly noteworthy is that these associations were observed in a relatively healthy, middle-aged population before measurable differences in memory and thinking were apparent. At the same time, this was an observational study, so we cannot conclude that ultra-processed foods caused these brain changes, although our models did account for other risk factors for brain injury,” the study author added. ## Association stronger among females The association appeared particularly strong among females. Women in the highest UPF consumption group were nearly twice as likely to show signs of brain damage as those in the lowest consumption group. The researchers noted that the findings were unexpected because the study participants were relatively young and had no history of heart disease. The findings suggest that signs of brain damage associated with vascular health may be detectable before people develop noticeable symptoms. “Overall, the associations appeared stronger in women, but the reasons remain uncertain,” de Souza noted to _MNT_. “I would view this as an intriguing signal that merits further study rather than a firm conclusion that women are more susceptible to the effects of ultra-processed foods on brain health.” **“Several explanations are possible. Women and men differ in body fat distribution, vascular biology, cardiometabolic risk, and hormonal factors, all of which can influence brain and vascular health,” he suggested.** “In particular, hormonal changes that occur during midlife and the menopausal transition may affect vulnerability to vascular risk factors. It’s also possible that women and men consume different types of ultra-processed foods, or that ultra-processed foods displace different whole foods in their diets,” de Souza detailed. “Two people may consume similar amounts of ultra-processed foods, but obtain them from very different sources with different nutritional profiles. Finally, we cannot exclude the possibility that the finding reflects residual confounding or chance, particularly given the smaller sample sizes involved in subgroup analyses,” he continued. ## Dietary habits in midlife may impact long-term brain health As the study analyzed data from relatively healthy adults aged 35 to 69, it highlights the potential importance of dietary choices in middle-aged adults and how it could affect their long-term brain health. “Many of the biological processes that contribute to stroke, cognitive decline, and dementia develop gradually over decades, often before symptoms become apparent,” de Souza noted. **“In our study, we observed differences in MRI markers of vascular brain injury in a relatively healthy, middle-aged population, even though we did not observe differences in memory and thinking. This suggests that potentially important brain changes may already be detectable during midlife,” he told us.** “I view our findings as adding to growing evidence that dietary habits in midlife may have implications for long-term health, including brain health. While we cannot determine cause and effect from this study, the results support the large body of evidence that lifelong healthy dietary habits that emphasize whole and minimally processed foods, while limiting ultra-processed foods, probably promote brain health as well,” he concluded. ## How might ultra-processed foods affect brain health? Dietary patterns high in UPFs have been associated with several health concerns, including obesity and metabolic problems. These conditions can affect blood vessels and [may contribute](https://academic.oup.com/eurheartj/article/47/27/3456/8661792) to inflammation, potentially influencing blood flow to the brain. Additionally, in the study, those who consumed the most UPFs also had more body fat and more deep abdominal fat than those who consumed the least. Deep abdominal fat, also known as visceral fat, surrounds internal organs and is [associated](https://pmc.ncbi.nlm.nih.gov/articles/PMC10421666/) with inflammation and an increased risk of cardiovascular and metabolic conditions. Damage to small blood vessels in the brain may develop when these vessels become impaired, potentially affecting the supply of oxygen and nutrients to brain tissue. Over time, such damage can be [associated](https://pmc.ncbi.nlm.nih.gov/articles/PMC10718363/) with an increased risk of stroke and problems with memory and thinking. **“One possibility is that diets higher in ultra-processed foods contribute to risk factors such as excess body fat, visceral fat, high blood pressure, diabetes, and other cardiometabolic conditions that can affect blood vessels throughout the body, including those that supply the brain,” de Souza explained.** “The brain relies on a healthy network of blood vessels to deliver oxygen and nutrients. Over time, factors that damage those blood vessels may contribute to the development of vascular brain injury,” he continued. “Other research groups are actively investigating whether characteristics of ultra-processed foods themselves, including aspects of food formulation, additives, food structure, or processing-related exposures, might influence health in ways that are not fully explained by calories or body weight alone,” added the researcher. However, the researchers did not establish whether body fat, inflammation, or blood vessel damage explained the association between UPF intake and the MRI findings. Additionally, as they assessed participants’ dietary habits and brain scans at a single point in time, they cannot determine whether greater consumption preceded the brain changes or whether reducing UPF intake would prevent or slow their development. Other factors may also contribute to the observed association. Thus, the findings do not mean that everyone who eats UPFs will develop brain damage, experience memory loss, or have a stroke. Further research is still necessary to determine the biological mechanisms involved. ## Ultra-processed foods may displace healthier options The study also found that people who ate more UPFs tended to eat fewer minimally processed foods, including fruits, vegetables, and grains. **On average, ultra-processed foods accounted for approximately 25% of participants’ daily food servings. Among the highest consumers, these foods made up 45% of daily servings, compared with 16% among those who consumed the least.** Meanwhile, whole and minimally processed foods accounted for 41% of daily servings among the highest consumers of ultra-processed foods, compared with 68% among the lowest consumers. This suggests that UPFs may not simply be added to an otherwise balanced diet. Instead, they may replace foods that provide important nutrients and dietary fiber. The researchers also highlighted the role of affordability, convenience, availability, and marketing in shaping dietary habits. For people with limited time or financial resources, UPFs may be a more accessible option than fresh or minimally processed alternatives. These factors could contribute to differences in dietary quality and potentially widen existing health inequalities. ## What can people do to support brain health? Although this study does not establish that avoiding UPFs will prevent brain damage, its findings add to the evidence supporting a balanced dietary pattern. People looking to [improve their dietTrusted Source](https://www.who.int/news-room/fact-sheets/detail/healthy-diet) may consider: * **Eating more minimally processed foods:** Fruits, vegetables, whole grains, beans, and other nutrient-rich foods can help provide fiber, vitamins, and minerals. * **Limiting foods high in added sugar, sodium, and saturated fat:** Checking nutrition labels can help people compare products and make informed choices. * **Making gradual, affordable changes:** Frozen vegetables, canned beans, and other convenient options can help people include more nutritious foods without relying entirely on fresh ingredients. * **Focusing on overall dietary patterns:
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