Vegans have a high risk of developing clinical symptoms related to vitamin B12 deficiency

Published in the European Journal of Clinical Nutrition (2010) 64, 933–939; doi:10.1038/ejcn.2010.142;

Serum concentrations of vitamin B12 and folate in British male omnivores, vegetarians and vegans: results from a cross-sectional analysis of the EPIC-Oxford cohort study
A M J Gilsing1, F L Crowe1, Z Lloyd-Wright2, T A B Sanders2, P N Appleby1, N E Allen1 and T J Key1
1Cancer Epidemiology Unit, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
2Nutritional Sciences Research Division, King's College London, London, UK

This study can be accessed at: http://www.nature.com/ejcn/journal/v64/n9/abs/ejcn2010142a.html

The results of the study showed vitamin B12 was highest among omnivores (281 pmol/l), intermediate among vegetarians (182 pmol/l) and lowest among vegans (122 pmol/l).

Half of the vegans were categorized as vitamin B12 deficient and would be expected to have a higher risk of developing clinical symptoms related to vitamin B12 deficiency.

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