Food addiction and binge eating share overlapping and non-overlapping features; the presence of both may represent a more severe obesity subgroup among treatment-seeking samples. Loss-of-control (LOC) eating, a key marker of binge eating, is one of the few consistent predictors of suboptimal weight outcomes post-bariatric surgery. This study examined whether co-occurring LOC eating and food addiction represent a more severe variant post-bariatric surgery.