Vegan and vegetarian pregnancy: the nutrients to watch
A plant-based diet can support a healthy pregnancy. The key nutrients vegans and vegetarians need, the best food sources and supplements to take.
A well-planned vegetarian or vegan diet can support a healthy pregnancy at every stage. The key is planning: a few nutrients are harder to get from plants alone, and pregnancy raises your needs. The Prego app personalizes its weekly nutrition advice for omnivore, vegetarian and vegan diets, and this guide covers the same essentials.
The nutrients to watch
| Nutrient | Why it matters | Best plant sources | Supplement? |
|---|---|---|---|
| Vitamin B12 | Baby's brain and nerves | Fortified plant milk, cereals and nutritional yeast | Essential for vegans |
| Iron | Your blood volume and baby's stores | Lentils, beans, tofu, tempeh, fortified cereals, blackstrap molasses | Often needed |
| Protein | Baby's growth | Lentils, beans, tofu, tempeh, seitan, quinoa, nuts, seeds | Usually not |
| Calcium | Baby's bones | Calcium-set tofu, fortified plant milk, almonds, kale, bok choy | Often needed for vegans |
| DHA (omega-3) | Baby's brain and eyes | Very little in plants | Algae oil recommended |
| Iodine | Thyroid and brain development | Iodized salt; seaweed is unreliable | Check your prenatal |
| Zinc | Growth and immunity | Beans, chickpeas, nuts, seeds, whole grains | Check your prenatal |
| Vitamin D | Bones and immunity | Sunlight, fortified foods, UV-exposed mushrooms | Usually recommended |
Vitamin B12
B12 is only reliably found in animal products and fortified foods. Low B12 in pregnancy can cause lasting harm to a baby's developing nervous system, so for vegans a B12 supplement is non-negotiable. Vegetarians who eat eggs and dairy may still fall short, so ask your provider to check your levels.
Iron
Plant (non-heme) iron is absorbed less well than iron from meat, so aim for iron-rich foods at every meal and always pair them with vitamin C: lentil curry with tomatoes, bean chili with peppers, or fortified cereal with strawberries. Avoid tea and coffee with meals, as they block absorption. Blackstrap molasses is a surprisingly rich source.
Protein
Aim for around 70 to 100 g of protein a day. Combining legumes with whole grains across the day, such as rice and lentils, or hummus and wholegrain pita, gives you all the essential amino acids. Tofu, tempeh, edamame and seitan are especially protein dense.
Calcium and vitamin D
Fortified plant milk and calcium-set tofu are the best vegan sources. Aim for 1,000 mg of calcium a day. Even with fortified foods, vegan diets often fall short, so a supplement may help. Calcium citrate absorbs well without food.
Omega-3 DHA
Flax, chia and walnuts provide ALA, a plant omega-3, but your body converts only a tiny fraction (often under 5%) into DHA. An algae-oil supplement provides DHA directly and is the most reliable plant-based option, especially in the third trimester when your baby's brain grows fastest.
Iodine and zinc
Seaweed's iodine content varies hugely, so it isn't a dependable source. Check that your prenatal contains iodine. Phytic acid in legumes and whole grains reduces zinc absorption; soaking, sprouting and fermenting help, and a prenatal covers the gap.
A sample vegan pregnancy day
- Breakfast: fortified cereal or oatmeal with fortified soy milk, berries, chia seeds and walnuts.
- Lunch: a lentil and roasted vegetable salad with quinoa, lemon and tahini dressing.
- Snack: hummus with red pepper strips and wholegrain crackers.
- Dinner: tofu stir-fry with broccoli, bok choy and brown rice.
- Supper: a glass of fortified plant milk and a handful of almonds.
Add your prenatal vitamin, B12 and algae DHA, as your provider recommends. For general guidance, see our full pregnancy diet guide and prenatal vitamins guide.
Frequently asked questions
Is it safe to be vegan while pregnant?
Yes. Major dietetic organizations agree that well-planned vegan diets are appropriate during pregnancy, as long as you supplement B12 and pay attention to iron, calcium, iodine and DHA.
Do vegetarians need extra supplements in pregnancy?
Usually a standard prenatal vitamin is enough for vegetarians who eat eggs and dairy, but DHA and iron are worth discussing with your provider.
Is soy safe in pregnancy?
Yes, in normal food amounts. Tofu, tempeh, edamame and soy milk are excellent sources of protein and, when fortified, calcium.
Sources
- Academy of Nutrition and Dietetics: Vegetarian diets position paper
- NHS: Vegetarian or vegan and pregnant
- NIH: Vitamin B12 fact sheet
General information only, not medical advice. Always follow the guidance of your doctor or midwife.
History of updates
- : Published.
Keep reading
Pregnancy diet: what to eat and what to avoid
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Prenatal vitamins: what you need in each trimester
Which prenatal vitamins and supplements you need in pregnancy, when to start them, and how needs for folic acid, iron, vitamin D and DHA change by trimester.
Caffeine during pregnancy: how much coffee is safe?
The safe caffeine limit in pregnancy is 200 mg a day. See how much caffeine is in coffee, tea, soda and chocolate, and tips for cutting back.