Parents united against the eating disorder: what the evidence says
Does standing together as parents actually make a difference, or does it just feel like it should? Researchers in Sydney set out to answer this (Ellison et al., 2012), following 59 young people through 20 sessions of family-based treatment (FBT), to see what predicted recovery in anorexia nervosa.
When parents were united, their children did better and gained more weight, the key early sign of recovery. Even more so, unity was what made everything else possible: parents who stood together were far more able to take charge of eating and hold the line at mealtimes. And this was true across all kinds of families, including re-partnered and single-parent households.
Newer research backs this up. A 2025 review of 39 studies (McCord et al.) found that when one parent lacked the other's support, they struggled to see meals through. For separated parents, keeping things consistent across both households is what supports renourishment. The united front matters just as much when it has to stretch across two households.
The takeaway for whānau is hopeful and practical: being on the same page as your co-parent genuinely helps your child recover, and it is something you can start working on today.
Ellison, R., Rhodes, P., Madden, S., Miskovic, J., Wallis, A., Baillie, A., Kohn, M., & Touyz, S. (2012). Do the components of manualized family-based treatment for anorexia nervosa predict weight gain? International Journal of Eating Disorders, 45(4), 609–614. https://doi.org/10.1002/eat.22000
McCord, A., Rice, K., & Rock, A. (2025). Caregiver factors influencing family-based treatment for child and adolescent eating disorders: a systematic review and conceptual model. PeerJ, 13, e19247. https://doi.org/10.7717/peerj.19247