Hi,
ARFID IS an eating disorder. But yes, there is no anorexia or bulimia type behaviours associated with it, although some people with ARFID can be increased risk of developing another eating disorder in addition such as anorexia.
People with ARFID, and that includes adults, can be underweight or overweight or they can maintain a normal weight. Weight is not a criteria for treatment, although it is used to assess physical health needs.
If your friend was eating normally before her traumatic event, and if she’s definitely telling the truth about not wanting to lose weight, then she could see her GP to find out what service provision there is in her area for Adult eating disorders. For children under 18, CAMHS and/or the dietetic team would run outpatient clinics although in England, although provision is sparse, often isn’t great and certainly not universally equal in support/knowledge of ARFID.
Our almost 18 yr old son has had ARFID since weaning but he is autistic and has sensory difficulties with taste, smell & the visual appearance of food. His rigid thinking means he finds it hard to try new foods or eat foods that aren’t always uniform in appearance.
If your friend’s ARFID is based purely on a past trauma, it might be that hypnotherapy or CBT could help her to realign her feelings towards food and it might be all that’s needed. Of course, if her health /weight is suffering, she would also benefit from seeing the GP for a health assessment and blood tests for nutrient deficiency.