The problem is with the glycemic index. Basically there are differences in carbs. Some rush strait to your blood stream causing a sudden glucose spike, which is followed by a sudden insulin spike. This can lead to weight gain.

The induciton list is important. It has low GI foods to help balance out your blood sugar. And yes the cravings do go away. The fact you are totally unwilling to give up something should be a strong indication of an addiction and that maybe it's time to let it go.

After induction you can slowly add back in other foods, which can include the occasional chocolate treat. Just make your own that are sugar free. You might find if you actually go through a clean induction with no sweets you lose the urge to have it though and can really appriciate it as an occaisonal treat, not a life or death must have.