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83377 posted an update
B-Vitamin Status and Concentrations of Homocysteine in Austrian Omnivores, Vegetarians and Vegans.
D. Majchrzak, I. Singer, M. Männer, P. Rust, D. Genser, K.-H. Wagner, I. Elmadfa; Ann Nutr Metab 1 February 2007; 50 (6): 485–491.
February 07 2007
DOI: 10.1159/000095828
… folate was found in 18% of omnivores and in approximately 10% of vegans and vegetarians.
.. riboflavin is considered to be deficient in about 10% of omnivores and vegetarians and in over 30% of vegans.
approximately one third of all subjects showed vitamin B6 deficiency.
Elevated homocysteine concentration in plasma was observed in 66% of the vegans and about 45–50% of the omnivores and vegetarians.
Vegan subjects had significantly higher mean plasma homocysteine levels than omnivores.
Thiamin and folate need not be a problem in a well-planned vegan diet.
Vitamins B12 and B2 may need attention in the strict vegan diet,
Pyridoxine status appeared to be independent of the diet.
