Q: Hi, I quit smoking three weeks ago, and I have noticed a dramatic increase in my weight (8 pounds) since then. I have been watching what I eat, and my intake has increased a little but not enough to justify an 8-pound gain. I was wondering what effect nicotine has on my metabolism or if that is even an issue. And if my metabolism slowed down, would it be beneficial to begin the Zone diet to "kick start" my metabolism once again?
A: Nicotine reduces insulin resistance. Once you stop smoking insulin resistance increases potentially causing significant weight gain. The Zone Diet was designed to reduce insulin resistance. Follow it, and you will see the weight return to the level before you stopped smoking.