Document Detail

The impact of vegan diet on B-12 status in healthy omnivores: five-year prospective study.
MedLine Citation:
PMID:  22493163     Owner:  NLM     Status:  In-Data-Review    
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.
Edyta Mądry; Aleksandra Lisowska; Philip Grebowiec; Jarosław Walkowiak
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta scientiarum polonorum. Technologia alimentaria     Volume:  11     ISSN:  1898-9594     ISO Abbreviation:  Acta Sci Pol Technol Aliment     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-04-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101295615     Medline TA:  Acta Sci Pol Technol Aliment     Country:  Poland    
Other Details:
Languages:  eng     Pagination:  209-12     Citation Subset:  IM    
Department of Physiology, Poznań University of Medical Sciences, Poland.
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