Skal veganere tage B12-tilskud?
Besvaret 24. oktober 2026
Yes. B12 is the one nutrient vegans need to get from supplements or fortified foods, because it occurs only in animal foods. Unfortified plant foods are not a reliable source. A systematic review found that vegans who take no supplements are at the highest risk of deficiency, and that the reported prevalence varies widely between studies, from 4% to 73%. Among studies that excluded supplement users, deficiency was 6 to 7% in two studies of vegans from Spain and Germany. Women of child-bearing age, pregnant and breastfeeding women, and older adults are the groups most at risk. A 2023 commentary recommends that people on a vegan diet take a certified B12 supplement. That is a commentary, not a trial, so the review evidence carries more weight.
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- Kommentar fra Quadram Institute, 2023Overblik eller holdning · KommentarThe importance of vitamin B12 for individuals choosing plant-based diets
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