How effective are interventions for preventing weight gain after smoking cessation?
The long term effect of all combined smoking cessation and weight control interventions on weight gain is small at best, at less than 1kg, (compared with a typical weight gain of about 5kg for continuous abstinence over 1 year), and is of borderline clinical relevance. The only possible exceptions are individualised weight control interventions, CBT and very low calorie diets.
Smoking cessation is usually accompanied by weight gain and people who quit smoking can expect to gain an average of 4kg to 6kg over 1 year of continuous abstinence. There are some interventions that have been specifically designed to assist smoking cessation while also limiting weight gain. Many smoking cessation pharmacotherapies and other interventions may also limit weight gain.