Health
Is a vegan diet safe in pregnancy?
Short answer
It can be, but it needs a plan and support from your obstetric doctor and a dietitian. Because the data are limited, the German Nutrition Society (DGE, 2024) neither recommends nor advises against a vegan diet in pregnancy. One thing is certain: B12, iodine, folic acid, DHA and vitamin D need to be supplemented, and nutrient status should be checked with blood tests.
Tell your doctor about your diet early in pregnancy so the right tests can be ordered. The usual topics: B12 every day (do not skip doses), iodine from a supplement (the doctor sets the dose; the requirement in pregnancy is 220 µg a day), folic acid, DHA from algal oil, vitamin D (under the 2023 Polish guidelines, 2000 IU a day if your level has not been tested), iron guided by ferritin and a blood count, and about 1000 mg of calcium a day (fortified drinks, calcium-set tofu).
B12 status is better checked with holotranscobalamin (active B12), methylmalonic acid (MMA) or homocysteine than with serum B12 alone. A high folic acid intake can mask B12 deficiency in a blood count, so a blood count alone is not enough.
When nausea makes pulses hard to face, smoothies, soft tofu and grains help. Avoid raw, fruit-only or “detox” diets in pregnancy. The same rules (especially B12, iodine and DHA) apply while breastfeeding.
Sources
- Vegetarian Dietary Patterns for Adults: Position Paper of the Academy of Nutrition and Dietetics (2025)
- The vegan diet — NHS
- DGE position on plant-based diets (Ernährungs Umschau, 2024)
- Dieta wegańska w okresie ciąży — NCEŻ PZH
- Polish guidelines on vitamin D supplementation, 2023 update (Nutrients)
- Normy żywienia dla populacji Polski (NIZP PZH, 2020)
- What every vegan should know about vitamin B12 — The Vegan Society