Iron and Postpartum: A Dietitian's guide

Sophie Mumby, Registered Dietitian (HCPC)

The early weeks after having a baby are tiring in ways nobody can fully prepare you for. I've had two babies and completely understand how hard it can be! Broken sleep is part of it, but low iron can quietly add to the exhaustion, and it's often overlooked once the focus shifts to your baby.

Why iron can be low postpartum. Blood loss during birth, particularly with a caesarean, a haemorrhage or a long labour, can reduce your haemoglobin and use up your iron stores. If you started pregnancy with low ferritin, or became anaemic during it, you may be recovering from a lower baseline. In the UK, postpartum anaemia is usually defined as haemoglobin below 100 g/L.

What do these numbers mean. Haemoglobin carries oxygen in your blood. Ferritin reflects your iron stores. You can have a normal haemoglobin with low ferritin, which may still leave you feeling flat, foggy or breathless. Ferritin can also be raised temporarily by inflammation, so it's best interpreted by a clinician alongside your symptoms.

I like to think of it like a bank. Your ferritin is your savings account, your body's store of iron. Whereas your haemoglobin is your spending money. You withdraw iron from your ferritin stores which helps to make haemoglobin which travels around your blood providing oxygen to your cells.

Signs worth mentioning to your GP or health visitor:

•Persistent fatigue beyond what feels expected

•Breathlessness, palpitations or dizziness

•Pale skin, headaches or hair shedding

•Low mood or difficulty concentrating (iron deficiency can contribute, though it is never the whole story)

Low ferritin levels also increase your risk of post-partum depression. So, if you are struggling with your mood, please get your ferritin levels checked as there may be an underlying cause!

Eating to support recovery. Aim for iron-rich foods across the day: meat, fish, eggs, pulses, tofu, fortified cereals and leafy greens, with a source of vitamin C alongside. Some simple ideas include; toast with eggs or baked beans, a bean-based chilli you've batch-cooked, or a handful of dried apricots with yoghurt. If you're breastfeeding, your iron requirements can actually lower than during pregnancy, if you're not menstruating, but you still need to replenish your stores.

If your bloods are low, you may be offered oral iron or, in some cases, an iron infusion. Please don't wait for your six-week check if you're struggling. You can ask for a blood test sooner.

Being kind to yourself around food. Feeding a newborn leaves little time to feed yourself. If you're skipping meals, feeling anxious about your body after birth, or noticing eating disorder thoughts returning, you're not alone, and postpartum is a particularly vulnerable time. Support exists, and asking for it is a strength.

This post is general information only. Please speak to your GP, health visitor or dietitian about your individual results and care.