Adult Eating Disorders and Nutritional Risk: The Expert Witness Perspective
- Rick Miller
- 4 days ago
- 3 min read
Eating disorders in adults carry serious, and measurable, nutritional and medical risk. Severe dietary restriction and the physiological disturbances that accompany it produce electrolyte abnormalities, cardiac compromise, and the danger of refeeding syndrome when nutrition is reintroduced without adequate caution. These are not subjective matters; they are demonstrable on blood results, observations and the clinical record, which is what makes the adequacy of care amenable to retrospective analysis.
As an HCPC-registered dietitian, I am instructed in matters where the nutritional management of an adult with an eating disorder is in issue. The dietetic question is specific and bounded, and keeping it bounded is essential to the credibility of the opinion.
The Standard of Care: A Multidisciplinary Model
NICE guidance on eating disorders (NG69) and the Royal College of Psychiatrists' guidance on Medical Emergencies in Eating Disorders (MEED, which replaced the earlier MARSIPAN and Junior MARSIPAN guidance) set out the standard. Eating disorders should be managed by a multidisciplinary team, with medical, psychiatric, psychological and dietetic disciplines each contributing within their scope.
Dietetic management addresses nutritional assessment, the safe planning and pacing of refeeding, and the monitoring of nutritional risk. Where dietetic input is absent, delayed, or delivered in isolation from the wider team, the management may fall below the recognised standard, and the records usually show it.
Refeeding Risk and Why It Is Foreseeable
The reintroduction of nutrition to a severely malnourished patient carries its own danger. Refeeding syndrome, driven by the insulin-mediated cellular uptake of phosphate, magnesium and potassium when carbohydrate is reintroduced, can cause cardiac arrhythmia, respiratory failure and death.
It is foreseeable and preventable. MEED and NICE require that refeeding risk be assessed before nutrition is escalated, that electrolytes be monitored and corrected, that thiamine be given, and that feeding be paced to avoid both refeeding syndrome and the opposite error of underfeeding a high-risk patient. A failure to plan and monitor refeeding is therefore one of the clearest and most serious failure points.
What Inadequate Nutritional Care Looks Like
In one recurring class of case, a severely underweight adult is admitted in a physically compromised state, nutrition is escalated without an adequate refeeding plan or biochemical monitoring, and a foreseeable electrolyte disturbance develops that appropriate management would have anticipated and prevented. In others the failure is the opposite: a high-risk patient is underfed for fear of refeeding and deteriorates as a result. Both are departures from a standard that MEED sets out in detail.
The Analytical Framework: Standard, Breach, Causation
My analysis establishes whether nutritional risk was identified and quantified, whether refeeding was planned and conducted safely, and whether dietetic input was provided at the point it was indicated and within an appropriate multidisciplinary structure, each judged on what was reasonable at the time rather than with hindsight.
Causation requires the expert to address whether competent nutritional management would, on the balance of probabilities, have prevented the harm, while recognising that the underlying disorder and its medical and psychiatric dimensions are powerful independent factors that must be weighed honestly.
Where the Boundaries Lie
The boundaries matter a great deal. Psychiatric and psychological formulation, diagnosis, and the treatment of the eating disorder itself belong to those disciplines, not to a dietitian. Decisions about compulsory treatment and the medical management of acute instability are medical and psychiatric matters. A dietetic report confines itself to nutritional risk and management and defers the rest explicitly. An opinion that respects those limits is more useful to a court, and more robust under cross-examination, than one that strays beyond them.
Practical Guidance for Instructing Solicitors
Records to obtain include: weight and BMI records with dates; biochemistry across the relevant period, particularly phosphate, magnesium, potassium and glucose; the documented refeeding plan and feeding records; physical-health monitoring and observations; and evidence of the multidisciplinary structure around the patient's care.
Key instruction questions: Was nutritional risk assessed and monitored appropriately? Was refeeding planned and conducted in line with MEED and NICE NG69? Was dietetic input provided within an appropriate multidisciplinary framework? And did any failure cause or materially contribute to the harm alleged?
Independent Dietitian Expert Witness
I provide independent expert witness opinion on nutritional risk in adult eating disorder cases, prepared to the standard required for court and within a clearly defined scope. You can learn more about my dietitian expert witness services or make an enquiry through rickmillerdietitian.co.uk.
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