Not for nothing, but this subthread has finally given me a name for my own eating disorder. I'm almost 45 and in the last 10 years I've made
some progress towards eating like a normal human being, but from childhood until I was almost 35 the stuff I'm reading about this disorder describes me incredibly closely. I grew up with food allergies (tree nuts, some seeds) and somewhat abusive father (he would get frustrated with me and hold me down and shove food in my mouth—obviously that didn't help matters any and I honestly believe that provided the impetus for most of my "origin story".)
This is something that affected nearly every aspect of my life. I didn't go to college away from home because I was afraid of cafeteria food in the dorms. I didn't join the military because rations. I never took a semester or year abroad because foreign food. Many of my relationships ended because seriously, how many times can a normal person eat bread and cheese in a week for years on end?
I'm sorry to unload here, I'm just reeling from having a name for this. I'm painting a picture here that is pretty bleak, because from the outside it definitely looked that way. I hope you're able to help your daughter move through it. The world today is far more accommodating than the one I grew up in though, so I'm sure her experience is somewhat different.