Health & Nutrition

Type 2 Diabetes Explained: Why Insulin Resistance, Not Sugar, Is the Real Culprit

Type 2 diabetes is usually explained as a sugar problem. This episode makes the case that the real story starts with insulin resistance, not the carbohydrates on your plate.

Vegans Explore Podcast

Episode 45 · Dec 15, 2025 · 6 min

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A Grease-Clogged Lock

Insulin works like a key that lets glucose into muscle and liver cells. When fat, particularly saturated fat from animal products and processed oils, builds up inside those cells, the lock gets gummed up and the key can no longer turn. Glucose backs up in the bloodstream, not because carbohydrates caused the problem, but because they exposed one that was already there.

Why Low-Carb Diets Improve Numbers Without Fixing the Disease

Cutting carbohydrates lowers blood sugar readings quickly because less glucose is entering the system, but it does nothing to clear the fat causing insulin resistance in the first place. A whole-food, plant-based pattern instead reduces saturated fat and raises fiber intake, allowing intracellular fat to clear and insulin sensitivity to return.

Type 2 diabetes begins as insulin resistance, driven mainly by intracellular fat buildup
Fasting insulin and C-peptide reveal insulin resistance long before blood glucose rises
Mastering Diabetes advocates Cyrus Khambatta and Robby Barbaro manage type 1 diabetes on carbohydrate-rich whole plant foods

The episode is careful to separate diabetes into its distinct forms, since type 1, type 1.5, prediabetes, type 2, and gestational diabetes all call for different approaches, even though insulin resistance plays a role in most of them.