[Not all patients might benefit from gastric by-pass].

Obesity is a chronic disease with a need for long-term follow-up. Bariatric surgery is very beneficial for patients who are not able to lose weight by lifestyle modifications alone. However, some patients present a weight regain after surgery. Predictive factors for the evolution of weight loss after bariatric surgery are not available today. For that reason, all preventive and therapeutic facilities should be used in order to reduce the risk of relapse after surgery. A recently introduced multidisciplinary therapeutic program for preparation of patients before bariatric surgery could be very valuable for a sustainable change of their lifestyle in order to minimize the risk of weight regain in the years after surgery.