Obesogens & Oxidative Stress in Metabolic Health, Neurodegeneration & Alzheimer's Disease | Robert Lustig | Episode 272

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Cellular metabolism, mitochondrial health, and the roles of diet and environment in metabolic health, fetal & child development, and Alzheimer's.

TOPICS DISCUSSED:

• Cellular growth vs. burning: Cells alternate between growing (using glucose for building blocks in low-oxygen environments) and burning (generating ATP in mitochondria with oxygen); dysregulation leads to metabolic issues.
• Key regulatory enzymes: PI3 kinase imports glucose, AMP kinase builds mitochondria, and mTOR drives cell division; their synchronization determines healthy modes, while desynchronization causes diseases.
• Fructose as a dose-dependent mitochondrial toxin: High fructose intake inhibits AMP kinase, reducing mitochondrial function and diverting energy to fat storage; it is dose-dependent, like alcohol, and unnecessary in the diet.
• Obesogens & endocrine disruptors: Chemicals like tributyltin (TBT) alter gene expression across generations, promoting obesity unrelated to calories; modern exposures increase reactive oxygen species (ROS), burdening cells.
• Fetal & neonatal development: Maternal diet, especially high sugar or formula feeding, can cause neonatal obesity and fatty liver; breastfeeding supports proper jaw development and oxygen intake.
• Brain metabolism & Alzheimer’s: The brain’s high energy needs make it vulnerable to mitochondrial issues and ROS; energy deficits from diet, stress, and toxins lead to synapse loss and inflammation, treatable via prevention.
• ROS & health: Mitochondria produce ROS as a byproduct of ATP generation; excess from diet or environment causes damage, but antioxidants and lifestyle can mitigate risks.

PRACTICAL TAKEAWAYS:

• Limit added sugars in your diet to reduce mitochondrial stress and ROS, focusing on whole foods over ultra-processed items for better metabolic health.
• Prioritize breastfeeding for infants when possible to support proper physical development and reduce future metabolic risks.
• Incorporate regular exercise and social activities to manage stress and boost brain-protective factors like BDNF, aiding neurodegeneration prevention.
• Get adequate sleep to regulate cortisol and maintain cellular energy balance, helping prevent brain fog and chronic diseases.

ABOUT THE GUEST: Robert Lustig, MD is a pediatric endocrinologist and Professor Emeritus at the University of California, San Francisco, with a background in neuroendocrinology and obesity research.

*Not medical advice.

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