Can You Take Magnesium When Breastfeeding? What Every Mum Should Know
Is It Safe to Take Magnesium While Breastfeeding?
Yes, magnesium is generally considered safe while breastfeeding. In fact, it's essential.
According to the Australian Nutrient Reference Values (NRVs) — in line with WHO recommendations — the RDI for lactating women varies by age:
| Age Group | RDI (Lactating Women) | Source |
|---|---|---|
| 19–30 years | 310 mg/day | Australian NRVs |
| 31–50 years | 320 mg/day | Australian NRVs |
Magnesium occurs naturally in many foods and is also available in supplements. Most healthy breastfeeding women can safely consume magnesium through diet and supplements, as long as it's within recommended limits.
Why Magnesium Is Important for Breastfeeding Mums
Breastfeeding and postpartum recovery are nutritionally demanding. Your body is working hard to make milk, heal, and keep your energy up—and magnesium plays a big role in this.
Magnesium supports:
Energy production – it helps convert food into fuel
Mood balance – it regulates neurotransmitters like serotonin and dopamine
Muscle and nerve function – easing tension and supporting better sleep
During the postpartum phase, magnesium needs can increase due to stress, disrupted sleep, and the physical toll of birth and breastfeeding. Keeping your magnesium levels up can help you feel more balanced, rested, and resilient.
Signs You Might Be Low in Magnesium Postpartum
Many mums don't realise they're low in magnesium until the symptoms start to show. If you're breastfeeding and feeling off, magnesium might be a missing piece of the puzzle.
Common signs of magnesium deficiency include:
Muscle cramps or twitching
Poor sleep or insomnia
Low mood or anxiety
Fatigue or brain fog
Headaches or migraines
Irregular heartbeat or palpitations
Breastfeeding increases your body's use of key nutrients like magnesium. Combine that with disrupted sleep and the stress of new motherhood, and it's easy to see why magnesium depletion is so common postpartum.
How to Safely Supplement Magnesium While Breastfeeding
💚 Dietary Sources of Magnesium
Your body absorbs magnesium best when it comes from whole food sources. These foods are rich in bioavailable magnesium, meaning your body can recognise and use it efficiently:
Leafy greens like spinach, silverbeet, and kale
Legumes such as chickpeas, lentils, and black beans
Nuts and seeds, especially almonds, cashews, and pumpkin seeds
Whole grains like quinoa, oats, and brown rice
Cacao (unsweetened or dark chocolate), which is naturally high in magnesium
Adding a variety of these to your meals (or snacks!) is a gentle and effective way to support your magnesium levels—no supplements required.
💊 Best Types of Magnesium for Breastfeeding Mums
If diet isn't enough (and let's be real—some days you're lucky to eat toast), supplementation can help. The most common forms for breastfeeding mums include:
| Form | Absorption | Best For | Recommended? |
|---|---|---|---|
| Magnesium Glycinate | High | Calm, sleep, sensitive stomachs | ✅ Yes |
| Magnesium Citrate | High | General use, digestive support | ✅ Yes (mild laxative effect) |
| Magnesium Malate | High | Energy, muscle support | ✅ Yes |
| Magnesium Oxide | Low | Laxative purposes only | ⚠️ Not recommended unless directed by a healthcare provider |
✅ How Much Is Safe?
The RDI for lactating women is 310–320 mg per day from all sources (food + supplements). Check the dosage on your supplement and ensure you're not significantly exceeding the RDI unless advised by your doctor or dietitian.
Precautions and When to Talk to Your Doctor
Magnesium is safe for most breastfeeding mums, but always check in with a healthcare professional if you:
Have kidney disease or digestive disorders
Take prescription medications, particularly diuretics, antibiotics, or heart medications
Are already taking other supplements with magnesium
Experience ongoing digestive symptoms like diarrhoea after taking magnesium
Magnesium supplements can interact with some medications and may not be suitable for everyone.
Final Thoughts
Magnesium can be a total game changer for breastfeeding mums—helping you sleep deeper, feel calmer, and manage the daily demands of motherhood with more ease. Whether you're adding cacao-rich snacks to your routine or trying a gentle supplement like magnesium glycinate, supporting your body during this chapter is one of the kindest things you can do for yourself.
As always, talk to your doctor before starting any new supplement, and give your incredible body the nourishment it deserves. 💛
