About the Guest: Dr. John Speakman is a biologist whose research focuses on energy balance, energy expenditure, genetic and environmental drivers of obesity and the energetic contribution to aging. Episode Summary: Nick talks to John Speakman, PhD about: the history of the obesity epidemic in the US vs. China; changes in patterns of physical activity, diet, and energy expenditure in humans over time; how saturated fats vs. PUFAs affect basal metabolism; the relative contributions of fats, carbs, and protein to fat & weight gain; and more.
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