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Ultraprocessed Foods and the Aging Brain: State of the Science
Owen T Carmichael1, Puja Agarwal2, Benedict C Albensi3
11Biomedical Imaging Center, Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA;
Annual Review of Nutrition
|May 15, 2026
Summary
Ultraprocessed foods (UPFs) are linked to negative brain aging effects. This review synthesizes evidence on UPF impacts on the aging brain, mechanisms, and future research directions.
Area of Science:
- Neuroscience
- Nutritional Science
- Gerontology
Background:
- Ultraprocessed foods (UPFs) are globally prevalent, characterized by low fiber/phytochemicals and high fat/sugar/salt/additives.
- Existing research links UPFs to adverse cardiometabolic health.
- Limited literature synthesizes UPF effects on the aging brain.
Purpose of the Study:
- To comprehensively review evidence connecting UPF consumption to brain aging.
- To explore proposed mechanisms of action for UPF-induced brain changes.
- To identify challenges and opportunities in studying UPF effects on brain aging.
Main Methods:
- Literature review synthesizing basic science and clinical evidence.
- Analysis of proposed biological mechanisms.
- Survey of current research challenges and future directions.
Main Results:
- Growing evidence suggests UPF consumption is associated with negative brain aging outcomes.
- Mechanisms include inflammation, oxidative stress, and gut microbiome alterations.
- Clinical studies show correlations between high UPF intake and cognitive decline.
Conclusions:
- UPF consumption poses risks to brain health during aging.
- Further research is needed to elucidate specific mechanisms and long-term impacts.
- Recommendations are provided for researchers and policymakers to address UPF-related brain aging concerns.
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