I didn't know it helps with that. Does it help for everyone or is it just something that happened to help you? My mother in law smokes so much and although she wants to quit, uses her cigarettes as a crutch to get through stress to the point that she can't quit.
We've even not bought her cigarettes for several weeks and as soon as she can get them, she does. She's so addicted she picks up butts off the parking lot.

It's a terrible, horrible addiction and it's killing her. She has a bad heart, trouble breathing....