Food tolerance and gastrointestinal quality of life, 2 to 4 years post-surgery are ostensibly best after SG, followed closely by RYGBP. AGB appears the least effective across these parameters. A significant positive relationship between food tolerance and gastrointestinal quality of life was confirmed.

The control and AGB groups consumed significantly more high-calorie extra foods, a result that was paralleled by poor weight loss and food tolerance outcomes for the AGB group. A significant positive relationship between food tolerance and diet quality was established. Poor food tolerance and thus compromised diet quality need to be considered as post-surgical complications of the AGB procedure.