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A new mouse study finds that high-fat parental diets — with or without added sugar — can delay early motor milestones and alter brain structure in offspring. High-sugar diets alone showed no significant brain-region changes. The findings raise questions about whether Western diet habits before and during pregnancy could influence neurodevelopmental risk in children.
A study published in Nutrients found that feeding breeding mice high-fat diets — alone or combined with high sugar — led to delayed motor development and measurable changes in brain structure in their offspring. Pups from high-fat diet groups were significantly slower to master the righting reflex (a basic motor milestone) compared to controls, and MRI scans of young adult brains revealed altered volumes in regions tied to social, emotional, and cognitive processing. High-sugar diets alone, however, produced no significant individual brain-region changes after statistical correction.
The most striking findings came from the combined high-fat/high-sugar group, which showed changes in 12 brain structures — including the corpus callosum and insula — with neuroanatomical patterns that partially overlapped with those seen in autism spectrum disorder (ASD)-related mouse models.
Key Takeaways:
Why it matters: Neurodevelopmental disorders like ASD and ADHD affect up to 18% of North American youth, and no curative treatments exist. If parental diet — a modifiable factor — influences offspring brain development, it could open new avenues for prevention strategies, though human studies are needed before any dietary recommendations can be made.
