ARFID and Restrictive Eating in Medicolegal Cases: What a Dietitian Expert Can Determine

Avoidant/Restrictive Food Intake Disorder (ARFID) is a feeding and eating disorder characterised by persistent avoidance or restriction of food intake, not driven by body image disturbance or fear of weight gain. In children and adolescents, it can produce profound nutritional consequences: faltering growth, micronutrient deficiencies, and in some cases clinical malnutrition requiring tube feeding.

In medicolegal proceedings, ARFID and related feeding disorders appear in several contexts: clinical negligence claims where the disorder was not diagnosed or managed appropriately; cases where ARFID is alleged as an explanation for growth failure but the clinical picture is more consistent with neglect; and criminal or family proceedings where the distinction between organic, psychiatric, and environmental causes of nutritional failure is in dispute.

ARFID in Clinical Negligence Claims

The most common clinical negligence instruction involving ARFID concerns delayed diagnosis and inadequate management. A child with restrictive feeding behaviour who is managed conservatively over a prolonged period, during which growth falters significantly, may have a claim if the standard of care required earlier specialist referral and dietary intervention.

The dietitian expert in such cases can address whether the child's nutritional presentation was consistent with a diagnosis of ARFID, whether early dietetic assessment was indicated, what a dietitian should have identified and recommended at the relevant time, and whether the management provided was consistent with NICE NG75 on faltering growth and the relevant ARFID clinical guidance.

The ARFID Presentation and Its Nutritional Consequences

ARFID typically produces a severely restricted food repertoire. The child may accept only foods of particular textures, colours, brands, or preparation methods, and may refuse any deviation with extreme distress. The nutritional consequence depends on which foods are accepted: a child who accepts only ultra-processed foods of a particular brand may have adequate caloric intake but profound micronutrient deficiencies. A child whose accepted repertoire is very limited in volume may fail to meet energy requirements as well.

A dietitian expert can analyse a child's documented food acceptance history against their nutritional requirements, identify which nutrients are likely to be deficient based on their accepted range, and assess whether the clinical management addressed those specific deficiencies.

ARFID in Criminal and Family Proceedings

In criminal proceedings involving alleged child neglect, ARFID can appear as an alternative explanation for nutritional failure. A carer may assert that a child's inadequate intake and faltering growth reflect the child's own feeding disorder rather than the carer's failure to provide adequate nutrition. Evaluating this requires clinical analysis of whether the child's presentation is consistent with ARFID, whether professional intervention was sought and followed, and whether the account given by the carer is consistent with the clinical record.

The key clinical question is whether the feeding restriction is child-driven or caregiver-driven. ARFID presentations typically show consistency across different caregiving environments — the child's food acceptance is restricted regardless of who is providing care. Where a child's intake and weight improve rapidly when caregiving changes, that pattern is not consistent with ARFID as a primary explanation.

Prison and Custodial Settings

ARFID and restrictive eating disorders also arise in adult custodial settings, where restricted feeding by an individual in custody raises complex questions about mental capacity, management, and duty of care. I have been instructed in cases involving radiologically inserted gastrostomy placement in prison settings, where the question of whether the clinical team met an acceptable standard of care in assessing and managing the individual's nutritional needs is the central issue.

Practical Guidance for Instructing Solicitors

Records to obtain: all paediatric clinical records referencing feeding, growth, and food acceptance; dietetic assessment records; growth charts from birth through the relevant period; GP records referencing feeding concerns; school nursing records; any CAMHS or clinical psychology records; and in criminal cases, all records from different caregiving environments where available.

Key instruction questions: Was the clinical presentation consistent with a diagnosis of ARFID? Was the standard of dietetic assessment and management consistent with NICE NG75 and relevant ARFID clinical guidance? Did the management provided meet the nutritional needs of the individual? Were there identifiable failures in care that contributed to the harm alleged?