The Diary Of A CEO with Steven Bartlett
The Diary Of A CEO with Steven Bartlett

Most Replayed Moment: Insulin Is The Reason You're Gaining Fat! How To Lower It Now

April 17, 2026 • 29m

Summary

⏱️ 10 min read

Overview

This episode features a comprehensive discussion about insulin resistance, metabolic health, and heart disease prevention. Dr. J explains how frequent eating and processed carbohydrates create chronically elevated insulin levels that lead to visceral fat accumulation and metabolic dysfunction years before diabetes is diagnosed. The conversation covers fasting protocols, ketosis, exercise strategies, and practical interventions for reversing metabolic damage and improving cardiovascular health.

Understanding Insulin Resistance and Metabolic Dysfunction

Dr. J breaks down the fundamental relationship between glucose and insulin, explaining how the body must quickly remove glucose from the bloodstream because it's toxic to blood vessels and molecules. When people eat frequently throughout the day, especially processed carbohydrates, insulin levels remain chronically elevated, leading to insulin resistance. This creates a destructive cycle where the pancreas must produce increasingly higher amounts of insulin to achieve the same blood sugar control, causing damage for years before diabetes is ever diagnosed.

  • Glucose is toxic in the bloodstream and glycates blood vessels, hemoglobin, enzymes, and hormones, preventing them from functioning normally
  • Frequent eating every 2-3 hours keeps insulin chronically elevated because insulin stays in the bloodstream for about 4 hours while glucose clears in 2-3 hours
  • Insulin resistance develops when hormones stay elevated for long periods, requiring more insulin to produce the same effect
  • By the time diabetes is diagnosed, patients have already had 10 years of hyperinsulinemia causing metabolic damage
" Even though it is what the body uses for energy in the bloodstream, it glycates all the blood vessels and the walls and the components in blood and the hemoglobin as well glycates it. That means the glucose attaches itself to that molecule. So now that molecule can't work properly. "
" By the time you are diagnosed as having diabetes, you already have coronary artery disease. "

The Devastating Impact of Visceral Fat

Dr. J explains that visceral fat—the fat stored around internal organs in the belly—is fundamentally different and far more dangerous than subcutaneous fat elsewhere in the body. This type of fat is produced specifically from glucose consumption and is highly inflammatory, producing toxic molecules that damage the entire cardiovascular system. The distribution pattern is distinctive: people look terrible from the side with protruding bellies but normal from behind, indicating dangerous metabolic dysfunction.

  • Visceral fat is produced specifically from glucose and accumulates around organs in the belly, creating a protruding stomach while other areas look normal
  • Visceral fat produces inflammatory molecules including interleukin-6, tumor necrosis factor, and elevated CRP that don't exist in subcutaneous fat
  • Ectopic fat accumulates not just around the liver and pancreas but also around the coronary arteries, directly stimulating plaque formation
  • High insulin from hyperinsulinemia makes it very difficult to lose weight because insulin is a storage molecule that puts everything away
" If I give you glucose, you put it on mostly in your stomach and your stomach will protrude and that's called visceral fat. It's on the inside, you can't pinch it, it's on the inside around your organs, this is very detrimental fat. "
" If I did a biopsy of your visceral fat versus a biopsy of, let's say, a fat on your buttock, two different types of fat. One is full of inflammatory molecules. The other one is not full of inflammatory molecules. "

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