@Laotionne - I have heard that lemons and lemonade can help curb bad habits and cravings. In addition to helping smoking quit smoking, the drink can also be used to limit alcohol consumption for people who have a difficult time saying no to one more drink. Along these lines, there is a red wine lemonade that some hard drinkers use as a way of cutting back on hard alcohol use.
The theory is the same as with the cigarettes you mentioned. As the liver detoxifies because of the lemonade you are drinking, there is less of a need to drink alcohol -- less of a craving. And the red wine lemonade is a good alternative to going cold turkey because you can slowly ween your system of the hard liquor. Trying to cut out all alcohol at once does not work for many people, so the wine and lemonade mixture is a good alternative.