3년간 비건 식단만 먹었다가…”비타민 결핍” 20대 여성, 불안·망상 증상에 극단적 선택 – 전자신문

The tragic death of a 21-year-old woman in Essex, United Kingdom, has brought the severe clinical consequences of long-term restrictive dietary patterns into sharp focus. Following a three-year period of strict adherence to a vegan diet, the patient experienced a rapid decline in mental health, characterized by persistent anxiety and delusional symptoms, which culminated in a fatal outcome. Clinical investigations conducted by the Cambridgeshire and Peterborough coroner, Elizabeth Gray, have identified profound vitamin B12 deficiency as a primary driver of this neurological and psychiatric deterioration.

Key Clinical Takeaways:

• Vitamin B12 is essential for DNA synthesis, erythropoiesis, and the maintenance of the myelin sheath surrounding neurons; its deficiency can lead to irreversible neuropsychiatric impairment.
• Restrictive plant-based diets lacking fortified foods or consistent supplementation place individuals at high risk for cobalamin depletion, which often presents initially with fatigue, cognitive fog, and paresthesia.
• Clinical management of restrictive diets requires regular hematological and neurological screening to monitor for subclinical deficiencies before they manifest as acute psychiatric morbidity.

The Pathogenesis of Cobalamin Deficiency

Vitamin B12, or cobalamin, is a water-soluble micronutrient primarily obtained through the consumption of animal-derived products. Its biological role is multifaceted, serving as a critical cofactor for enzymes involved in the conversion of methylmalonyl-CoA to succinyl-CoA and the synthesis of methionine from homocysteine. When systemic levels are chronically depleted, the standard of care is disrupted, leading to the accumulation of homocysteine and methylmalonic acid. This metabolic imbalance is toxic to the central nervous system, often manifesting as demyelination.

The clinical presentation observed in this case—anxiety and delusions—aligns with documented neuro-psychiatric manifestations of B12 deficiency. According to literature archived via PubMed, the psychiatric spectrum of this deficiency can range from mild depression to severe psychosis. Because B12 is vital for neurotransmitter modulation, including dopamine and serotonin synthesis, its absence can fundamentally alter cognitive function. Patients adhering to strictly exclusionary diets must be aware that supplemental sprays or oral formulations are not uniformly effective if dosage and absorption protocols are not managed under clinical supervision.

Diagnostic Challenges and Clinical Surveillance

One of the most significant hurdles in preventing such outcomes is the latency between the onset of deficiency and the manifestation of overt symptoms. Initial indicators, such as peripheral neuropathy (hand and foot tingling), cognitive fatigue, and impaired concentration, are frequently dismissed as psychosomatic or stress-related. The transition from these prodromal signs to permanent neurological damage can occur rapidly in vulnerable populations.

“The neuro-cognitive decline associated with severe cobalamin deficiency is not merely a nutritional deficit; We see a systemic failure of neurological homeostasis. Clinicians must maintain a high index of suspicion when evaluating patients who present with sudden-onset psychiatric symptoms, particularly those following restrictive dietary protocols,” notes a leading specialist in clinical nutrition and metabolic disorders.

For individuals navigating complex nutritional requirements or those managing chronic health conditions, proactive engagement with specialized diagnostic services is essential. Patients seeking to optimize their nutritional intake while mitigating risks should consult with board-certified clinical nutritionists to ensure their dietary protocols are clinically sound and supplemented appropriately. Those exhibiting early signs of cognitive or neurological disturbance should seek immediate evaluation from specialized neurologists to rule out metabolic etiologies.

The Role of Clinical Governance in Public Health

The incident highlights a critical gap in public health communication regarding the necessity of standardized supplementation. While environmental and ethical considerations drive many to adopt restrictive diets, the physiological necessity for specific micronutrients remains non-negotiable. Healthcare providers are increasingly tasked with bridging the gap between patient lifestyle choices and evidence-based medicine. This requires a shift toward routine screening for B12 levels in high-risk groups, including those who have maintained strict dietary restrictions for extended durations.

Effective clinical oversight involves more than just identifying deficiencies; it requires an audit of the patient’s current supplementation regimen. As evidenced by the subject’s reliance on insufficient B12 sprays for several months prior to her death, self-managed supplementation is often inadequate. Healthcare systems must emphasize the importance of validated, physician-monitored dosage protocols. Organizations and clinics looking to implement better patient monitoring systems for nutritional health may consult with healthcare compliance consultants to ensure that patient education and screening programs meet current standards of care.

The trajectory of future research in this area must prioritize the development of more sensitive biomarkers for early-stage B12 deficiency, as standard serum tests can occasionally fail to detect functional cellular deficits. Until such diagnostics become the standard, clinical vigilance and patient education remain the most potent tools for preventing such preventable tragedies. Those seeking to establish comprehensive care plans that integrate nutritional counseling with neurological and psychiatric support are encouraged to contact integrated health centers, which provide a multidisciplinary approach to patient wellness.

Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.