What nonclinical studies suggest about energy-dense diets and the nervous system
A systematic review linked diets high in fat or sugar with biochemical, structural and behavioral changes, but the abstract leaves major questions about human cognitive effects unanswered.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review describes nervous-system changes in studies of diets high in fat, sugar or both. These changes appeared alongside shifts in gut microbes and metabolic signaling. The findings identify possible links worth investigating, but the abstract does not establish how these diets affect cognition in people or whether any prevention strategy works.
The abstract does not identify the study organisms, dietary comparisons, exposure lengths or sizes of effects. Its nonclinical scope limits what this summary can say about human symptoms or treatment.
What the review examined
Researchers gathered work on biochemical signals, molecular processes and behavior after exposure to energy-dense dietary patterns. The review considered changes in nerves throughout the body as well as in the brain.
Possible links remain questions
The authors highlight gut microbial composition, glucose and insulin metabolism, and bile acid signaling as connected areas of change. Their summary calls for further nonclinical and clinical research to clarify how these processes relate.
The original publication
Biochemical, Molecular and Behavioral Changes Induced by High-fat and High-sugar Diets: A Systematic Review of Non-clinical Studies.
Bach C, Souza JV, Oliveira CS et al.
Mol Neurobiol · 2026
- PubMed ID
- 41886211
- Record checked
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