The Dr. Gabrielle Lyon Show

Why Do Most Diets Fail? The Science of Nutrient Deficiencies | Ty Beal PhD

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May 20, 2025
In this engaging discussion, Dr. Ty Beal, a Senior Technical Specialist at GAIN and a global nutrition researcher, highlights the hidden epidemic of micronutrient deficiencies affecting billions worldwide. He examines why 3 billion people can’t afford healthy diets and the impact of ultra-processed foods displacing nutrient-rich options. Dr. Beal emphasizes the critical need for dietary diversity, fortification, and the overlooked risks of plant-based diets. This chat uncovers the complexities of nutrition, particularly for women and children, and the urgent need for reform in food systems.
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INSIGHT

Global Micronutrient Deficiency Crisis

  • Three billion people worldwide cannot afford a healthy diet, leading to widespread micronutrient deficiencies.
  • Many in low-income regions consume staple foods lacking diversity, leaving them nutrient deficient and struggling for calories.
INSIGHT

Micronutrient Deficiencies Are Widespread

  • Two out of three women of reproductive age and one in two children globally are deficient in one or more micronutrients.
  • Deficiencies like iron and vitamin D are surprisingly common even in high-income countries such as the US and UK.
INSIGHT

Critical Early-Life Nutrition Window

  • Micronutrient deficiencies during pregnancy and early childhood can cause lifelong impacts including stunted growth and cognitive impairment.
  • The first 1,000 days—from pregnancy through two years old—are critical for preventing irreversible damage.
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