#544: Genetic Variants and Response to Nutrients – Martin Kohlmeier, MD PhD

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Introduction

In the realm of nutrition science, individual differences are more profound and impactful than many realize. For decades, we’ve developed dietary recommendations with a “one-size-fits-all” approach, assuming that most people respond similarly to specific nutrients. But Dr. Martin Kohlmeier, a pioneer in precision nutrition, challenges this very notion.

How might an individual’s genetic makeup alter their need for certain nutrients?

With advances in nutrigenetics, we’re beginning to see how personalized nutrition could bridge long-standing gaps in dietary efficacy. Dr. Kohlmeier’s work highlights fascinating examples, from the APOE4 gene’s influence on cholesterol metabolism to variations in folate metabolism that could affect everything from heart health to birth outcomes.

As Dr. Kohlmeier explains, precision nutrition is not simply about adding genetic testing to a wellness regimen. Instead, it requires rethinking nutrition research from the ground up—ensuring studies capture these individual variations and that public health policy moves beyond broad averages.

With genetic testing now more accessible than ever, could commercial pressures and oversimplified testing derail the science before it even gets going? In this episode, we dive deep into the potential and pitfalls of precision nutrition, exploring the future of personalized dietary advice and the road to truly individualized health.

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Timestamps

Guest Information

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He was based at the University of North Carolina at Chapel Hill for over three decades, before he retired in 2024.

His academic and research career is characterized by interdisciplinary efforts to understand the genetic basis of nutrient metabolism and its implications for health. During his tenure at UNC, Dr. Kohlmeier focused on nutritional genetics and personalized nutrition, aiming to tailor dietary recommendations based on individual genetic profiles.

Dr. Martin Kohlmeier, MD PhD
a distinguished nutrition scientist known for his extensive work in the field of nutritional biochemistry and genomics.

Danny Lennon has a master’s degree (MSc.) in Nutritional Sciences from University College Cork, and he is the founder of Sigma Nutrition.

Danny is currently a member of the Advisory Board of the Sports Nutrition Association, the global regulatory body responsible for the standardisation of best practice in the sports nutrition profession.

Danny Lennon
MSc. in Nutritional Sciences from University College Cork

Introduction to this Episode

In the realm of nutrition science, individual differences are more profound and impactful than many realize. For decades, we’ve developed dietary recommendations with a “one-size-fits-all” approach, assuming that most people respond similarly to specific nutrients. But Dr. Martin Kohlmeier, a pioneer in precision nutrition, challenges this very notion.

How might an individual’s genetic makeup alter their need for certain nutrients?

With advances in nutrigenetics, we’re beginning to see how personalized nutrition could bridge long-standing gaps in dietary efficacy. Dr. Kohlmeier’s work highlights fascinating examples, from the APOE4 gene’s influence on cholesterol metabolism to variations in folate metabolism that could affect everything from heart health to birth outcomes.

As Dr. Kohlmeier explains, precision nutrition is not simply about adding genetic testing to a wellness regimen. Instead, it requires rethinking nutrition research from the ground up—ensuring studies capture these individual variations and that public health policy moves beyond broad averages.

With genetic testing now more accessible than ever, could commercial pressures and oversimplified testing derail the science before it even gets going? In this episode, we dive deep into the potential and pitfalls of precision nutrition, exploring the future of personalized dietary advice and the road to truly individualized health.

Useful Terminology for this Episode

Key Terms & Acronyms
  • Omics Sciences: Comprehensive fields of study in biology that analyze the roles, relationships, and actions of various molecules within cells. This includes genomics (study of genomes), proteomics (study of proteins), and metabolomics (study of metabolites).
  • Nutrigenomics: The study of how individual genetic variations influence a personʼs response to nutrients and dietary interventions.
  • Precision Nutrition: A personalized approach to nutrition that integrates genetic and environmental factors to optimize dietary recommendations.
  • Categorical Variables: Discrete biological outcomes, such as lactose tolerance or sex differences, that influence nutrition.
  • Responders vs. Non-Responders: Terms describing individual variability in response to dietary interventions or nutrient intake.
  • Phenylketonuria (PKU): A rare genetic disorder impacting metabolism, requiring specific dietary interventions.
  • Apolipoprotein E (APOE): A gene with three common alleles (E2, E3, E4); E4 is linked to increased Alzheimer’s and LDL cholesterol sensitivity.
  • Methylenetetrahydrofolate Reductase (MTHFR): An enzyme critical for folate metabolism; genetic variants can impact health outcomes like birth defects or mental health.
  • Dihydrofolate Reductase (DHFR): Another enzyme involved in folate metabolism; certain genetic variants are linked to increased breast cancer risk with folic acid supplementation.

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