A Review of Recent Scientific Papers Related to Vegetarianism
By Reed Mangels, PhD, RD, FADA
On the other hand, 58 percent of strict vegans and 34 percent of moderate vegans had a vitamin B12 deficiency, based on the concentration of vitamin B12 in their blood. They also had high concentrations of homocysteine, a substance that has been associated with an increased risk of heart disease. Elevated homocysteine can be caused by a vitamin B12 deficiency. The elevated homocysteine concentrations seen in these vegans may explain why death rates from heart disease tend to be higher in vegans than in lacto-ovo vegetarians. Vegans should strive for an adequate vitamin B12 intake, both to prevent vitamin B12 deficiency and to reduce risk of heart disease.
Waldmann A, Koschizke JW, Leitzmann C, Hahn A. 2005.
German vegan study: Diet, life-style factors, and cardiovascular risk profile. Ann Nutr Metab 49:366-72.
2007-09-05
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