I’ve often recommended switching to a diet higher in natural fats and lower in refined carbohydrates. What’s the deal with dietary fat? Simply put, dietary fat does not raise insulin. And hyperinsulinemia is the main driver of obesity. Hyperinsulinemia means literally, high insulin in the blood (hyper means high, and -emia means blood levels).
So, logically, switching refined carbohydrates (raises insulin) for dietary fat, can lower insulin levels significantly even if you take the same total number of calories. But what is so different about dietary fat compared to both protein and carbohydrates that makes this true? It all comes down to the different ways that proteins and fats are metabolized.