Episode 605

Why Excess Added Sugar is Driving Modern Diseases and How to Take Back Our Metabolic Health and Overcome a Sedentary Lifestyle

With Dr. Robert Lustig
& Dr. Richard Johnson

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Sugar is everywhere in the modern diet, and it’s silently driving a massive wave of chronic illness. From insulin resistance and fatty liver to cognitive decline, the overconsumption of ultra-processed, sugar-laden foods has created a health crisis hiding in plain sight. As scientists uncover deeper connections between sugar, metabolism, and brain health, one thing is clear: this isn’t just about cutting calories—it’s about changing the way we eat to protect our long-term well-being.

Today on The Dhru Purohit Show, we’re bringing you a special compilation episode featuring Dhru’s conversations with top experts on the connection between insulin resistance, fatty liver, and Alzheimer’s disease. 

Dr. Robert Lustig shares the impact of added sugar on mitochondrial health and metabolism. He also discusses what you can expect when significantly reducing the amount of added sugar in your diet, why the quality of your calories matters, and the fascinating ways our bodies store fat. 

Dr. Richard Johnson discusses his revolutionary new hypothesis on the link between fructose consumption and Alzheimer’s disease. Dhru and Dr. Johnson discuss the evolutionary mechanism behind fructose metabolism, insulin resistance, and weight gain, which has backfired due to its overconsumption.

Also mentioned:

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I hope you enjoyed this conversation as much as I did.
Wishing you health and happiness.
Dhru Purohit

In this Episode, you will learn

  1. What is leptin resistance
    (2:11)
  2. Thin on the outside, fat on the inside (TOFI)
    (5:55)
  3. The three sites of fat deposition in the body
    (6:47)
  4. Key findings from the SHINE study
    (17:03)
  5. The Metabolic Matrix: feed the gut, protect the liver, and support the brain
    (21:35)
  6. Dr. Johnson’s hypothesis on the link between Alzheimer’s and fructose consumption
    (25:05)
  7. The origins of Alzheimer’s: what’s happening in the brain
    (33:28)
  8. Uric acid as a driver of fat accumulation, and its connection to gout, obesity, and other diseases
    (31:13)
  9. The relationship between salt, dehydration, and fructose production
    (45:51)
  10. How fructose increases our cravings for sugar
    (50:01)
  11. The role of fructose in Alzheimer’s disease
    (56:56)

Guest

 
Dhru Purohit

Dhru is the host of the Dhru Purohit Show, a top 30 health podcast with over 30 million downloads. His interviews focus on the inner workings of the brain and the body and feature the brightest minds in wellness, medicine, and mindset.

Dhru Purohit is also a serial entrepreneur and investor in the health and wellness industry.

 
Dr. Robert Lustig

Dr. Robert Lustig is a neuroendocrinologist with expertise in metabolism, obesity, and nutrition. He’s the Emeritus Professor of Pediatrics in the Division of Endocrinology and a member of the Institute for Health Policy Studies at UCSF. He is the author of Metabolical: The Lure and the Lies of Processed Food, Nutrition, and Modern Medicine.

 
Dr. Richard Johnson

Dr. Richard Johnson is a professor of medicine at the University of Colorado Denver and has been a practicing physician and clinical scientist for over 25 years. He is internationally recognized for his seminal work on the role of fructose in obesity, diabetes, and now, Alzheimer’s disease. His work also highlights the fundamental role of uric acid (which is generated during fructose metabolism) in metabolic syndrome.

Dr. Johnson is a prolific scientist with research that has been funded by the National Institute of Health since the 1980s. He is a member of the American Society for Clinical Investigation and has published over 700 papers, lectured in over 45 countries, and is a highly cited scientist. He is the author of The Fat Switch and his newest bestselling book, Nature Wants Us to Be Fat.

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