“Proper planning is hard”

What planning involves

For nonpregnant, nonlactating adults, the Academy of Nutrition and Dietetics states that appropriately planned vegetarian and vegan dietary patterns can be nutritionally adequate (Raj et al., 2025). “Appropriately planned” is substantive: eliminating animal products does not automatically create a balanced intake, and the relevant tasks vary with age, health status, energy needs, medication use, pregnancy, lactation, and food availability (Raj et al., 2025).

The nutrient watch list is relatively consistent across reviews (Bakaloudi et al., 2021; Neufingerl & Eilander, 2021). A systematic review of 48 European studies found lower vegan intakes of vitamin B12, vitamin D, iodine, zinc, calcium, potassium, and selenium, while noting that lower intake did not always correspond to clinical impairment (Bakaloudi et al., 2021). A broader review of 141 studies reported lower intake or status of vitamin B12, vitamin D, iron, zinc, iodine, calcium, EPA, and DHA in plant-based groups, while protein intake was generally within recommended levels (Neufingerl & Eilander, 2021). The same review found that meat-eaters also had nutrient inadequacies, particularly for fiber and several unsaturated fats, vitamins, and minerals (Neufingerl & Eilander, 2021). Planning is therefore relevant across dietary patterns, although the specific gaps differ (Neufingerl & Eilander, 2021).

Reducing repeated decisions

Vitamin B12 requires an explicit vegan-specific plan because plant foods do not naturally contain it; fortified cereals, fortified nutritional yeast, and supplements provide reliable sources (NIH ODS, 2026a). A regular supplement schedule matched to product dose and directions, or a verified pattern of fortified foods, can make B12 provision a fixed routine rather than a repeated meal-level decision (NIH ODS, 2026a). Dose selection should account for age, absorption disorders, medications, pregnancy, and laboratory findings rather than relying on a single schedule for everyone (NIH ODS, 2026a).

Iodine requires a similarly explicit source (NIH ODS, 2026b). NIH identifies vegans and people consuming little dairy, seafood, or eggs as groups who may not obtain sufficient iodine, and identifies iodized salt as the most widely used population strategy (NIH ODS, 2026b). Routine meals can use legumes, whole grains, nuts, seeds, and vegetables, while fortified products can supply specific nutrients; nutrient content and fortification should be checked rather than assumed (Bakaloudi et al., 2021; Neufingerl & Eilander, 2021). Reviews support food fortification and supplementation as practical tools for closing identified gaps (Neufingerl & Eilander, 2021).

Access and feasibility

Planning burden is not uniform (Fehér et al., 2020; USDA ERS, 2026). A review of barriers to plant-based diets identified convenience, financial constraints, social barriers, taste, and concerns about nutritional adequacy (Fehér et al., 2020). USDA food-access mapping documents neighborhoods where distance and transportation affect which stores people can reach, the time and cost of travel, and shopping frequency (USDA ERS, 2026). Food deserts, limited time, disability, institutional meals, and restricted budgets can therefore make default meals and fortified products less accessible (Fehér et al., 2020; USDA ERS, 2026). For people with adequate access, a small set of fixed nutrient sources and default meals can reduce repeated planning; access barriers can keep that burden high (NIH ODS, 2026a; NIH ODS, 2026b; Fehér et al., 2020; USDA ERS, 2026).