#568: Does the Maternal Diet Impact Risk of ADHD & Autism? – David Horner, PhD

#568: Does the Maternal Diet Impact Risk of ADHD & Autism? – David Horner, PhD

Author: Danny Lennon July 1, 2025 Duration: 45:01

To what extent can maternal nutrition during pregnancy influence a child's later cognitive or behavioural development?

While genetic and environmental factors are known to contribute to neurodevelopmental outcomes such as ADHD and autism, growing attention is being paid to the potential role of prenatal exposures, including dietary patterns. Yet, evidence in this area remains limited, and causality is difficult to establish.

One recent study aimed to explore this question by analysing how maternal diet quality during pregnancy (specifically, adherence to a Western-style dietary pattern) related to neurodevelopmental outcomes in children assessed clinically at age 10.

In this episode, Dr. David Horner discusses the findings from this prospective cohort study, the use of metabolic markers to complement dietary data, and the implications for future research into modifiable prenatal risk factors.

About The Guest

Dr. David Horner is a researcher in maternal nutrition and cardiometabolic health, based at the University of Copenhagen, Denmark. He is also a qualified medical doctor from Queen's University of Belfast.

His research is driven by a keen interest in modifiable determinants of health, aiming to better understand and improve health outcomes.

Having worked as a medical doctor for 2 years in the UK, in 2017 Dr. Horner then moved to Copenhagen, where he completed a Master's in Global Health and a PhD examining the impact of maternal dietary patterns during pregnancy on child health.

Timestamps

  • [02:47] Introduction to the study
  • [07:08] Strengths and findings of the study
  • [21:17] Genetic factors and gene-environment interactions
  • [25:42] Metabolomics and potential mechanisms
  • [30:12] Interpreting the study's findings
  • [38:03] Future research directions
  • [42:50] Key ideas segment (Sigma Nutrition Premium)

Related Resources


Sigma Nutrition Radio, hosted by nutrition scientist Danny Lennon, moves beyond the noise of diet trends and simplistic advice to explore the complex, fascinating world of human nutrition. This is a space for deep, evidence-based conversations that acknowledge the nuance and often contradictory nature of scientific research. Each episode delves into a specific topic within health, fitness, or dietetics, breaking down the underlying physiology, examining the latest studies, and discussing practical implications with expert guests. The goal isn't to hand out rigid meal plans but to cultivate the critical thinking skills necessary to navigate the ever-changing landscape of nutritional science. You'll hear detailed analyses of how research is conducted, thoughtful debates on contentious issues, and explorations of how evidence translates-or doesn't-into real-world recommendations for different individuals. Tuning into this podcast means committing to a more sophisticated understanding of how food, movement, and metabolism interact, leaving you better equipped to make informed decisions about your own health and skepticism towards the next big headline. Danny’s approach is both rigorous and accessible, making even the most detailed biochemical pathways relevant to everyday life. It’s for anyone who has ever wondered about the real story behind a nutrition claim and values substance over soundbites.
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