This week, Brent speaks with Dr. Marc Hellerstein, a physician-scientist and pioneer in metabolism research, to explore what insulin resistance actually is, why fatty liver disease has become one of the fastest-growing health problems, and how the body processes carbohydrates, fat, and protein. The conversation also examines popular topics like intermittent fasting and low-carb diets, separating what the evidence supports from what's still uncertain. Dr. Hellerstein also explains why metabolic health is about much more than glucose alone, offering a deeper understanding of how our bodies produce, store, and use energy over time. He's a wonderful guest, hope you enjoy.