Issue 11 (2) 2012 pp. 209-212
Edyta Mądry1, Aleksandra Lisowska2, Philip Grebowiec2, Jarosław Walkowiak2,3
2Department of Pediatric Gastroenterology and Metabolism, Poznań University of Medical Sciences, Poland
3Department of Human Nutrition and Hygiene, Poznań University of Life Sciences, Poland
The impact of vegan diet on B-12 status in healthy omnivores: five-year prospective study
Background. There are no long-term prospective studies assessing the impact of the vegan diet on vitamin B-12 (B-12) status. Many vegans take B-12 supplements irregularly or refuse to adopt them at all, considering them to be “unnatural” products. The use of B-12 fortifi ed food may be an alternative. Therefore, we aimed to estimate the long-term effect of a vegan diet on serum B-12 concentrations in healthy omnivore adults, comparing the infl uence of natural products consumption and B-12 fortifi ed food.
Material and methods. A fi ve year prospective study was carried out comprising 20 omnivore healthy adult subjects, who moved to strict vegan diet for 5 years. Ten volunteers followed vegan diet based entirely on natural products, while the remaining ten subjects consumed food fortifi ed in B-12. In all subjects serum vitamin B-12 concentration was determined before and 6, 12, 24 and 60 months after the implementation of the diet.
Results. A signifi cant decrease (p < 0.0002) of serum B-12 concentrations in the whole studied group was noted after 60 months of vegan diet. However, observed changes were in fact limited to the subgroup consuming exclusively natural products (p < 0.0001).
Conclusions. Transition from omnivore to vegan diet is associated with the risk of vitamin B-12 defi ciency. B-12 fortifi ed products might constitute a valuable alternative in vegans refusing to take vitamin supplements.
Keywords: vegan diet, vitamin B-12, risk of defi ciency, vegetarianism
|MLA||Mądry, Edyta, et al. "The impact of vegan diet on B-12 status in healthy omnivores: five-year prospective study." Acta Sci.Pol. Technol. Aliment. 11.2 (2012): 209-212.|
|APA||Mądry E., Lisowska A., Grebowiec P., Walkowiak J. (2012). The impact of vegan diet on B-12 status in healthy omnivores: five-year prospective study. Acta Sci.Pol. Technol. Aliment. 11 (2), 209-212|
|ISO 690||MąDRY, Edyta, et al. The impact of vegan diet on B-12 status in healthy omnivores: five-year prospective study. Acta Sci.Pol. Technol. Aliment., 2012, 11.2: 209-212.|