Pregnancy changes your body's mineral demands, and magnesium is one of the first things to run short. The best magnesium for pregnancy depends on what symptoms you're dealing with, how your body absorbs it, and whether you're getting it through food, supplements, or through your skin.
We’ll help you uncover the best type of magnesium for pregnancy, but just know that form is equally important. Most oral supplements (pills and powder) cause more harm than good.
On the other hand, a magnesium bath soak delivers real minerals transdermally to keep levels up - all while allowing you to indulge in the ultimate self-care. Whether it’s restless legs or irritability, sore muscles or insomnia, learn about which magnesium is best for pregnancy below!
Key Takeaways
- You need more magnesium during pregnancy, but probably don't get enough from diet alone.
- The best magnesium for pregnancy leg cramps, sleep issues, and stress is magnesium chloride. It’s the most bioavailable form.
- Oral supplements can trigger GI side effects that are already frustrating during pregnancy. Transdermal delivery avoids that entirely.
- Flewd Stresscare combines the best magnesium for pregnancy with other proven nutrients to help you navigate this wonderful period of life gracefully. Try a soak today.
What Is Magnesium?
This mineral is involved in over 300 biochemical reactions - everything from muscle function and nerve signaling to energy production and hormone regulation. Those systems all work harder than normal during pregnancy. Plus, you’re eating for two now. Magnesium levels end up depleted.
Your body doesn't make magnesium on its own, so it has to come from outside - food, supplements, or transdermal absorption. We’ll get into which magnesium is best for pregnancy in a moment, but first, let’s talk about why it’s so important in the first place.
Why You Need the Best Magnesium For Pregnancy
The short version: your body is doing more with the same (or less) supply. Magnesium gets depleted faster during pregnancy, and the symptoms of deficiency overlap with what people chalk up to “just being pregnant.”
But, a lot of what makes pregnancy so taxing can be managed with enough magnesium.
Easing Restless Legs
Restless leg syndrome was our biggest complaint during pregnancy, especially in the third trimester. It’s also where magnesium can help the most since it plays a direct role in muscle relaxation and nerve signaling - the two culprits behind that constant urge to move your legs at night.
Our blog has more tips on how to help restless leg syndrome during pregnancy. But adding magnesium is a no-brainer.
Supporting Better Sleep
Sleep can feel so elusive during pregnancy, between the bathroom trips, body aches, and a brain that won't shut off. Magnesium helps by regulating melatonin production and calming the nervous system.
It's not a sedative. It gives your body the what it needs to wind down on its own instead of fighting to stay alert while you're trying to rest. It creates the ideal conditions for sleep to come naturally.
Keeping Stress in Check
Cortisol levels naturally rise during pregnancy. That's expected. But your body loses one of its primary tools for keeping that cortisol proportional when magnesium levels drop.
The result is a stress response that feels bigger than the trigger warrants - irritability, racing thoughts, that on-edge feeling for no reason. Having enough magnesium in your body helps dial that stress response back a notch.
Encouraging Better Regularity
Constipation is one of the most common pregnancy complaints, and magnesium (especially citrate) has a well-documented benefit here. Just be aware that this is a double-edged sword - too much oral magnesium can swing the other direction.
Getting magnesium through the skin avoids the GI impact entirely while still raising your overall levels. That’s why it’s the best form of magnesium during pregnancy.
More Pregnancy-Specific Benefits
Magnesium supports healthy blood pressure regulation, which you probably already know matters more during pregnancy when preeclampsia risk is on the table.
This mineral also plays a role in fetal bone development and helps minimize the frequency of muscle cramps across the body (not just in the legs). There are countless reasons to add magnesium to your pregnancy arsenal given how many things it’s involved in.
Is It Safe, Though? Potential Side Effects to Be Aware Of
Magnesium is generally considered safe within recommended ranges, but always check with your provider before starting anything new. That’s the standard while you’re expecting. Treat everything as a risk until you’ve confirmed otherwise.
The most common side effect of oral supplements is GI disruption: loose stools and cramping, sometimes nausea. These hit harder during pregnancy because your digestive system is already taxed.
Again, though, transdermal magnesium sidesteps this because it doesn't pass through the gut. Start at the lower end of dosing and work up if needed. Spelling of which…
How Much Magnesium Do You Need During Pregnancy?
Even the best magnesium for pregnancy won’t move the needle if you’re not taking enough of it. But you don’t want to overdo it, either. The sweet spot for pregnant women is 350-400 mg depending on age.
Most Americans already fall short of the non-pregnant target, which means starting pregnancy at an adequate level is pretty rare. Your provider may recommend higher amounts based on your individual bloodwork.
Remember, not all of what you consume actually gets absorbed. Oral supplements get absorbed at around 30-40%. Transdermal delivery (through the skin in a warm bath) puts more of the mineral into your system without the GI filter reducing the yield.
How much you take matters less than how much your body actually uses.
Best Food Sources of Magnesium During Pregnancy
Diet is your first line of defense, even though it's rarely enough on its own. The best magnesium during pregnancy comes from a combination of food and targeted supplementation. High-magnesium foods worth working into your rotation:
- Pumpkin seeds: One of the most concentrated food sources of magnesium. A small handful delivers a meaningful dose.
- Dark leafy greens: Spinach and Swiss chard are the top picks. Cook them lightly to reduce oxalates that can block absorption.
- Almonds and cashews: Easy to snack on with solid magnesium content and a good protein pairing.
- Black beans: High in both magnesium and fiber (which helps with the regularity issue too).
- Dark chocolate: Yes, really. A square or two of 70%+ dark chocolate delivers a meaningful amount of magnesium.
- Avocado: Magnesium plus healthy fats that support nutrient absorption.
Even a diet packed with these foods typically falls short of the 350-400 mg target. That's where supplementation fills the gap. So, which magnesium is best for pregnancy?
Which Magnesium Is Best For Pregnancy? Choosing the Best Type of Magnesium For Pregnancy
Not every form of magnesium does the same thing. The best type of magnesium for pregnancy depends on what you're trying to address - but bioavailability (how well your body absorbs it) is the most important thing to consider across the board. Here's how the main forms stack up.
Magnesium Chloride
The most bioavailable form by far, and the best magnesium for pregnancy when delivered transdermally (through the skin). Your body absorbs magnesium chloride more efficiently than virtually any other form, which means more of what goes in actually reaches your cells.
Magnesium Glycinate
The gentlest oral option and the most popular recommendation for pregnant women taking pills. It's well-absorbed through the digestive tract and less likely to cause GI side effects than citrate or oxide. Glycinate also supports sleep and helps ease anxiety.
We see magnesium chloride vs magnesium glycinate compared a lot, but the absorption rate is the main distinction. Your body has a way easier time using magnesium chloride than glycinate, especially through the skin. You can also compare magnesium taurate vs glycinate in our blog.
Magnesium Citrate
Decent absorption and widely available. The catch is that citrate has a noticeable laxative effect. That's a benefit for some pregnant women who struggle with constipation. It's a problem that compounds an already uncomfortable period for others.
Weighing magnesium carbonate vs citrate for sleep support? Citrate wins on absorption, but both carry GI risk that you could avoid altogether through transdermal delivery.
Other Forms You May Come Across
- Magnesium Oxide: Cheap and everywhere. Poorly absorbed (as low as 4%). You'd need to take way more to match what other forms deliver, and the GI side effects are awful.
- Magnesium L-Threonate: Crosses the blood-brain barrier, which is awesome for cognitive function - but that’s probably not your main goal during this period of life.
- Magnesium Taurate: Recommended for cardiovascular support, not so much for pregnancy.
- Magnesium Aspartate: Magnesium aspartate vs glycinate is a common comparison. Aspartate is reasonably well-absorbed but doesn't carry the calming benefits glycinate offers.
All things considered, which magnesium is best for pregnancy? Stick with magnesium chloride.
Why Topical Magnesium Is Better Than Oral Magnesium During Pregnancy
Oral magnesium during pregnancy means asking your already-stressed digestive system to do even more work - and absorbing only 30-40% of what you swallow in the process.
In contrast, topical magnesium skips the gut and gets the good stuff right into your bloodstream. But you don’t have to settle for magnesium spray vs pills. A warm bath soak opens your pores and lets magnesium chloride absorb through the skin while your muscles relax in the heat.
This checks every box for pregnancy - higher absorption and zero GI disruption, plus a relaxation ritual your body genuinely needs. It's why transdermal magnesium chloride is the best magnesium for pregnancy by far.
Flewd Stresscare soaks are 99% active ingredients with magnesium chloride hexahydrate as the base. They’re a great epsom salt replacement that actually delivers clinical-grade mineral absorption. These are a few of our most popular formulas among pregnant women:
- Ache Erasing soak: Magnesium + Vitamins C and D alongside plant-derived Omega-3s. Built for muscle tension and body aches. Scent: warm woody with sweet citrus.
- Insomnia Ending soak: Magnesium + Vitamins A and E plus L-Carnitine. Designed for the nights your brain won't stop. Scent: warm sweet citrus (calamus and mandarin).
- Anxiety Destroying soak: Magnesium + full B-vitamin complex (including folic acid) and Zinc. Targets the anxious, racing-thought side of pregnancy stress. Scent: sweet woody with bright citrus.
Soak for 15-20 minutes in water below 100°F and rinse lightly with warm water afterward. Two to 3 sessions per week keeps your levels consistent.
All scents come from essential oils rather than synthetic fragrance - but we DO have unscented varieties if that’s something you’re more comfortable with. It’s still not a bad idea to run the ingredient list by your OB to confirm everything checks out for your pregnancy.
Try the stress relief bath soak bundle and feel what the best magnesium for pregnancy can do!
Wrapping Up Our Guide on the Best Magnesium During Pregnancy
Which magnesium is best for pregnancy comes down to two things:
- Form
- Delivery method
Magnesium chloride leads on bioavailability. Transdermal delivery leads on absorption and GI safety. Put them together and you've got the best magnesium for pregnancy without the downsides of swallowing another supplement.
Your body is already doing extraordinary work - make sure it has the mineral support it needs!
“This soak is great for a calming and relaxing evening. It helps me have a more restful sleep with less tossing and turning. The scent is nice as well. This is my second time ordering these soaks and I still love them, they work for me and smell great.” - Lynsie
“I have a lot of pain and muscle aches daily and when I am able to soak in my bath tub these are extremely effective. I am able to sleep with much less discomfort. The scent is wonderful.” - Lauren
“Very happy with my assortment of soaks. I definitely feel more balanced.” - Patty
