My fiance and his dad already quit smoking cigarettes. They didn't gain the weight at all. They are still same shapes. If you're gain the weight and maybe eating too much?
They might don't gain the weight, but you can see the difference when a smoker quit smoking, they usually eat more. I was told by my dad that when he quit smoking, he eat more than when he was smoking and that was one of his reason why he was happy that he stopped smoking too, that's what my dad told me. Also I was the heaviest baby in entire of Portland city in my birth year and that was the causlite by my mom quitting smoking during I was in her stomach because she got doubled hunger from being pregnanted and quit smoking.