"Low carb and high fat: The fat goes to your fat cells (that is, whatever fat you don't burn for fuel immediately after eating), but since your insulin is low the fat is readily burned off relatively soon."

- The fat you eat does not have to be stored as fat, the raised insulin levels are necessary for the body to store energy as fat.

"Low fat and high carb: The carbs cause an insulin spike, and insulin inhibits fat burning, BUT since you haven't stuffed much fat into your fat cells, there isn't much to burn off when your insulin eventually comes back down. You need to be relatively insulin sensitive, so that your insulin level does come back down. Even if you're insulin resistant, this diet might still work if you eat only a tiny amount of fat."

- Carbs can be converted to fat via lipogenesis.