7 MIN READ

Why Can't I Lose Belly Fat? The Insulin and Cortisol Answer

It is rarely about willpower

If you are eating less and belly fat still will not move, the problem is usually hormonal, not motivational. Two hormones dominate fat stored around the midsection: insulin and cortisol.

The insulin side

While insulin is high, your body physically cannot access fat for fuel — insulin is the store signal. Chronically high insulin from a high-sugar, high-refined-carb diet keeps visceral fat locked in place no matter how hard you train.

The cortisol side

Cortisol, the stress hormone, preferentially drives fat storage to the abdomen and raises blood sugar, which raises insulin. This is why stress and poor sleep sabotage fat loss even when your diet is clean. Our sister site SnapStress focuses entirely on this dial.

The fix is to lower both dials

Lower insulin with the food and movement levers in this library, and lower cortisol with sleep, stress control and recovery. Belly fat responds when both hormones come down together. Start with the free Metabolic Score to see which dial is working against you most.