Veganism: Vitamin B12 is well supplemented, iodine is a matter of concern

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Veganism: Vitamin B12 is well supplemented, iodine is a matter of concern




There was no significant difference in vitamin B12, which was present in approximately the same amount in both groups' blood. Since vitamin B12 is taken up almost exclusively by animal food, the supply of participants following a vegan diet could be due to dietary supplements. "This study makes it possible to compare a vegan diet with a mixed diet about various vitamins and trace elements," says BfR President Professor Dr. Andreas Hensel. "Both diets investigated revealed a lack of iodine. However, the shortage is clearly more distinct in the vegan variant."

In the RBVD study, the BfR research team analyzed blood and urine samples and evaluated lifestyle questionnaires and dietary protocols. Of those participating (18 women and men respectively per group aged 30-60 years), almost all those following a vegan diet and one third following a mixed diet took different food supplements.

The study results were particularly noteworthy about the trace element iodine. Iodine excretion measured in urine samples provides information on how well the body is supplied with the trace element. The majority of the participants had a deficiency. The deficiency was significantly more pronounced among vegans. In one-third of them, the level was below 20 micrograms per liter (?g/L), the limit defined by the World Health Organization (WHO); anything below this represents a serious shortage. However, a vegan diet has also shown health benefits, such as a higher fiber intake and lower cholesterol levels. For both diets, about 10% of participants had an iron deficiency.


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