Read our complete vegan pregnancy guide for the full picture on nutrition in plant-based pregnancy.
Iron is one of the nutrients that demands the most attention during pregnancy, and for vegans it requires an extra layer of thought. The good news is that with a little planning, getting enough iron on a plant-based diet is entirely achievable.
Why Iron Matters in Pregnancy
During pregnancy, your blood volume increases by roughly 50 per cent. Your body needs significantly more iron to produce the extra haemoglobin required to carry oxygen to your growing baby. At the same time, your baby is building its own iron stores, which will sustain it through the first six months of life. The NHS recommends 14.8mg of iron per day during pregnancy, though requirements vary depending on existing stores and individual circumstances.
Iron deficiency anaemia is one of the most common nutritional deficiencies in pregnancy. Left unaddressed, it can cause fatigue, breathlessness, impaired immune function, and in more severe cases, complications for both mother and baby including preterm birth and low birth weight.
Symptoms of Iron Deficiency to Watch For
Many symptoms of iron deficiency overlap with the general experience of early pregnancy, which can make them easy to overlook. Worth noting:
- Persistent tiredness that does not improve with rest
- Shortness of breath on mild exertion
- Pale skin, gums, or inner eyelids
- Heart palpitations
- Difficulty concentrating
- Brittle nails or hair loss
If you are experiencing any of these, ask your GP or midwife for a blood test. Iron levels are routinely tested at your booking appointment and again around 28 weeks, but you can always request an earlier check if you have concerns.
Haem vs Non-Haem Iron: Why the Difference Matters
Iron comes in two forms. Haem iron is found in meat and is absorbed at a rate of around 15 to 35 per cent. Non-haem iron is found in plant foods and is absorbed at a rate of just 2 to 20 per cent, depending on what else you eat at the same meal. This is the central challenge for vegan pregnancy iron intake: you can eat plenty of iron-rich plant foods and still absorb less iron than someone eating a smaller amount of meat-based iron.
This does not mean vegan diets cannot support adequate iron intake. It means you need to be deliberate about both the foods you eat and how you prepare and combine them.
Best Vegan Sources of Iron
These plant foods provide meaningful amounts of non-haem iron:
- Legumes: Lentils (around 3.3mg per 100g cooked), chickpeas (2.9mg), black beans (2.1mg), edamame (2.3mg)
- Tofu: Firm tofu provides around 2.7mg per 100g
- Seeds: Pumpkin seeds (8.8mg per 100g), hemp seeds (7.9mg), sesame seeds (14.6mg)
- Wholegrains: Quinoa (1.5mg per 100g cooked), oats (2mg per 100g raw)
- Leafy greens: Spinach (3.6mg per 100g raw), kale, watercress
- Dried fruit: Apricots (2.7mg per 100g), raisins, prunes
- Dark chocolate: 85% cocoa dark chocolate provides around 11.9mg per 100g
How to Boost Iron Absorption: Practical Tips
The single most effective thing you can do to improve non-haem iron absorption is to eat vitamin C alongside iron-rich foods at the same meal. Vitamin C significantly enhances the solubility of iron in the gut, making it more available for absorption. Some straightforward pairings:
- Lemon juice squeezed over lentil soup or dahl
- Red pepper stir-fried with tofu
- Orange segments with a spinach and seed salad
- Tomatoes alongside a chickpea dish
There are also things that inhibit non-haem iron absorption, and it is worth being mindful of them around mealtimes:
- Tea and coffee: The tannins in both bind to iron and reduce absorption. Avoid tea or coffee for at least an hour before and after iron-rich meals.
- Calcium-rich foods: High calcium intake at the same meal (such as a large serving of fortified plant milk) can compete with iron absorption. Keep dairy-alternative servings moderate alongside iron-rich meals.
- Phytates: Found in wholegrains and legumes, phytates bind to iron and reduce its bioavailability. Soaking, sprouting, or fermenting legumes and grains reduces phytate content substantially.
When to Consider an Iron Supplement
If your blood tests show low ferritin or haemoglobin, your GP will typically recommend an iron supplement. Even if your levels are within range, a good vegan pregnancy supplement covering iron is a sensible precaution given the increased demands of pregnancy and the lower bioavailability of plant-based iron. The key is choosing the right form.
Most NHS iron supplements use ferrous sulphate, which is effective but frequently causes constipation, nausea, and stomach cramps — particularly difficult to tolerate in early pregnancy when digestion is already under strain. Ferric diphosphate is a gentler alternative that delivers reliable iron repletion without the digestive side effects. It is the form used in the Vegums Iron Absorption Bundle, paired with vitamin C to maximise absorption.
For a complete overview of vegan pregnancy nutrition, including all the other key nutrients to address, read our complete vegan pregnancy guide.
