{
  "id": 91403,
  "title": "Parental high-fat diets leave lasting marks on offspring brain development",
  "url": "https://urgent.news/2026/08/03/parental-high-fat-diets-leave-lasting-marks-on-offspring-brain",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-03T16:00:09.000Z",
  "source": {
    "name": "PsyPost",
    "slug": "psypost",
    "url": "https://www.psypost.org/parental-high-fat-diets-leave-lasting-marks-on-offspring-brain-development/"
  },
  "original_language": "en",
  "account": "A recent study published in Translational Psychiatry reveals that a parent's consumption of high-fat and sugary foods during pregnancy and lactation can lead to lasting changes in the brains of their offspring. Utilizing a mouse model, scientists found that early exposure to such diets alters specific brain regions from infancy through adulthood, even if the offspring switch to a healthy diet early in life. These findings suggest that early nutritional environments may impact long-term brain health and the risk of certain neurodevelopmental conditions. Maternal diet quality is known to influence brain growth and function, with maternal high-fat diets potentially triggering inflammation, altering gut bacteria, and changing gene expression in the developing fetus. These shifts in animals correspond to behavioral changes resembling human neurodevelopmental disorders like autism spectrum disorder and ADHD. However, studying these changes in humans is challenging due to complex dietary habits tracking over years. To overcome these limitations, researchers from The Hospital for Sick Children and the University of Toronto employed a mouse model. They monitored 104 offspring, randomly assigned to either a healthy control diet, a Western-style diet (42% fat and 34% sugar), or a high-fat diet (60% fat, low sugar), starting eight weeks before breeding. All offspring, regardless of their parents' diet, were later switched to the healthy control diet. The researchers used MRI to scan the offspring at eight specific ages, measuring the volume of 182 brain structures and controlling for age and sex. The results showed that offspring of parents on Western and high-fat diets were heavier at birth but normalized their weight after switching to the control diet. Despite weight normalization, the exposed offspring exhibited altered brain development. Smaller brain regions like the cerebral peduncle were observed at 14 days of age, while larger regions like the cingulate cortex remained enlarged by adulthood. The CA3 region of the hippocampus, crucial for memory, was smaller in high-fat and Western diet groups by adulthood. Overall, early diet exposure led to broader neuroanatomical trends, with cortical regions increasing in volume over time and deeper subcortical regions decreasing.",
  "summary": "A parent's diet before and during pregnancy leaves lasting physical marks on offspring brains. A new mouse study shows that parental high-fat diets alter brain structure into adulthood, even if the offspring transition to healthy eating.",
  "key_points": [
    "Parental high-fat diets alter offspring brain development",
    "MRI scans show altered brain regions in exposed offspring",
    "High-fat diet linked to neurodevelopmental condition risk"
  ],
  "editors_take": "Parental high-fat diets during pregnancy and lactation lead to lasting changes in offspring brain development, potentially increasing the risk of neurodevelopmental conditions like autism spectrum disorder and ADHD.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}