I am not a smoker but according to my friends who smoke, it helps in keeping control of their appetite. In fact, one friend would smoke right before eating. I guess it is effective in killing the appetite because most of those smokers have maintained a nice figure of their body. However, we know that smoking has undesirable side effects particularly the disease that it can bring so I am not considering it. But maybe in dire situations that I needed to lose weight then smoking is an option.