A coroner ruled that a vitamin B12 shortfall contributed to psychiatric symptoms in a young student, prompting renewed scrutiny of vegan nutrition and public health advice
The death of a 21-year-old student whose mental health crisis was attributed to a severe nutrient shortfall has focused attention on the potential pitfalls of a strict vegan approach to eating. The case involved Georgina Owen, a geography student from Essex, who avoided meat, dairy, eggs and other animal products for three years for environmental reasons.
At an inquest, a coroner concluded that a deficiency of vitamin B12 produced delusional thinking and other psychiatric effects that preceded her taking her own life. This article reviews the facts of the inquest, the underlying nutrition science, and public-health guidance for people following a plant-based diet.
Across the UK, interest in plant-based diets has surged in recent years: research by Finder estimates roughly 3.5 million people now eat predominantly plant-based, and participation in the Veganuary movement is high, with as many as a fifth of Britons trying it each year.
While evidence links vegan patterns to lower risks of heart disease, diabetes and some cancers, clinicians and nutrition scientists warn that without proper planning and supplementation, people can develop serious deficiencies. The NHS specifically recommends that anyone avoiding animal products take a daily vitamin B12 supplement to prevent neurological and hematological damage.
What happened in the inquest and the biochemical explanation
The coroner for Cambridgeshire and Peterborough, Elizabeth Gray, found that Georgina Owen suffered anxiety and other “psychiatric manifestations” linked to very low levels of vitamin B12. Medical evidence presented included blood tests consistent with deficiency and reports of delusional symptoms. Experts attending the inquest described how vitamin B12, an essential water-soluble micronutrient, is central to nervous system function and blood cell formation. Because B12 is found primarily in animal-derived foods such as meat, fish, milk and eggs, people who exclude those foods are dependent on fortified products or supplements to meet physiological needs.
How deficiencies develop and early warning signs
Clinicians caution that symptoms of B12 deficiency often begin subtly: persistent fatigue, cognitive slowing or “brain fog,” muscle weakness, and tingling in extremities can precede more severe neurological or psychiatric changes. Some clinicians note that, if supplementation is not established, deficiency can emerge within months to a few years after adopting a strict vegan pattern—though individual rates vary. In Georgina Owen’s case, testimony indicated she had stopped taking an effective supplement and used an “organic” oral spray delivering about one microgram daily, below the NHS guideline of roughly 1.5 micrograms for adults, which contributed to inadequate stores.
Broader nutritional concerns linked to plant-based diets
Beyond vitamin B12, researchers have raised alarms about other nutrients that may be harder to obtain from exclusively plant sources. A 2018 University College London study warned that insufficient intake of calcium, zinc and high-quality protein could impair growth and neurological development in children, with potentially irreversible outcomes in severe cases. Government data and expert commentary in 2026 also highlighted rising rates of iron deficiency among teenage girls as consumption of dairy alternatives such as oat and almond milk has increased; some fortified plant milks do not fully replace the micronutrient profile of dairy for every consumer.
Risks for pregnancy and bone health
Research published in the European Journal of Nutrition in 2026 flagged additional concerns for pregnant people following vegan diets, including higher risks of complications such as low birth weight, pre-eclampsia and miscarriage when key nutrients are missing. Bone health can also be affected by low calcium and inadequate protein, increasing fracture risk over time. Public-health recommendations therefore emphasise targeted supplementation, routine monitoring, and diet planning, particularly for vulnerable groups like children, adolescents and pregnant people.
Practical guidance and public-health perspective
Health professionals and organisations including the NHS recommend that anyone avoiding animal-derived foods use reliable supplements and consider fortified foods to maintain nutrient balance. In practice that means taking an appropriate daily vitamin B12 supplement, ensuring sources of iron and calcium—and, when needed, having blood tests to check levels. Clinicians also urge clear messaging: while many can benefit from plant-forward diets, adequate planning prevents harm. The tragic case of Georgina Owen has underscored how a single overlooked nutrient can have catastrophic consequences and why accessible guidance, monitoring and high-quality supplements matter for those choosing to avoid animal products.
