A well-planned vegan diet can meet most nutrient requirements, but fortified foods and targeted supplementation are central to long-term micronutrient sufficiency for many people. The position paper by Winston J. Craig Loma Linda University and Ann Reed Mangels University of Massachusetts Amherst for the Academy of Nutrition and Dietetics emphasizes that vegetarian and vegan diets can be healthful but require attention to specific nutrients that are scarce or absent in unfortified plant foods.
Why fortified foods matter
Certain micronutrients are primarily available in animal-derived foods or in forms poorly available from plants. Vitamin B12 is produced by microbes and is essentially absent from reliable plant sources; prolonged inadequacy causes megaloblastic anemia and potentially irreversible neurological damage. Iodine, vitamin D, calcium, iron, zinc, and long-chain omega-3 fatty acids such as EPA and DHA have higher deficiency risk on unfortified vegan diets. The clinical consequence of neglect can range from subtle declines in bone health and cognitive performance to clear clinical deficiency syndromes. Public health agencies such as the United Kingdom National Health Service recommend that people following vegan diets obtain vitamin B12 from fortified foods or supplements, reflecting these risks.
Practical approaches and contextual factors
Fortified plant milks, breakfast cereals, fortified nutritional yeast, and fortified spreads provide practical routes to reliable intake of key micronutrients without animal products. Availability and composition vary by country and manufacturer, so label reading is necessary. In regions with mandatory salt iodization, iodine intake is more secure, while territories without iodized salt or with low soil selenium make iodine and selenium status more precarious. Environmental and cultural considerations are relevant: fortification programs and supplements allow dietary choices that reduce animal agriculture’s footprint while maintaining public health, but reliance on processed fortified foods may conflict with cultural preferences for whole-food traditions.
For omega-3s, algal DHA supplements provide a direct plant-compatible source of long-chain fatty acids. For vitamin D and B12, supplements remain the most predictable strategy for long-term sufficiency when fortified foods are inconsistent or unavailable. In short, fortified foods are not universally mandatory for every motivated vegan, but for population-level safety and many individuals they are a practical necessity to prevent important deficiencies.