Examining the contribution of weight-bias internalization to the associations between weight suppression and disordered eating in undergraduates.

Weight suppression (WS) is consistently, positively associated with eating disorder (ED) symptoms, but variables that contribute to these associations remain understudied. The current study examined weight-bias internalization as a potential contributor to the link between weight suppression (WS) and disordered eating in an undergraduate sample. Men (n = 285) and women (n = 610) completed assessments of weight history, weight-bias internalization, and ED symptoms. Absolute (difference in highest and current BMI) and relative WS (%BMI change) were calculated. Hierarchical linear and count regression models examined whether WS contributed to ED symptoms (restraint, objective binge episodes [OBEs], loss-of-control [LOC] eating, and compensatory exercise) above and beyond weight-bias internalization. Analyses were conducted by gender. After accounting for weight-bias internalization, WS demonstrated unique associations with restraint in men (p = .01) and women (p < .001), and LOC eating frequency in men (p = .02), though effects were weaker relative to weight-bias internalization. Although WS was positively correlated with frequency of OBEs in men and LOC eating in women, these associations were no longer significant when accounting for weight-bias internalization. Weight-bias internalization was positively associated with all measured ED symptoms. Consistent with previous work, gender differences in the relations of WS and ED symptoms emerged. Results suggest weight-bias internalization might contribute to links between WS and ED symptoms, particularly binge behaviors, in non-clinical samples. Future research should explore whether decreasing weight-bias internalization could weaken the association between WS and ED symptoms.