08/05/2026
We’ve all been there—staring at a screen, feeling the phantom vibration of a notification that hasn't even happened yet, while our shoulders slowly migrate toward our ears. Our nervous systems are a little dramatic. They treat a passive-aggressive email from a boss the same way they’d treat a predator in the wild. It’s exhausting, and it leaves us feeling physically drained and mentally fried.
When we’re looking for a way to hit the reset button, we often turn to the basics. That’s where the combination of a baking soda and magnesium bath comes in. It’s a classic, effective, and science-backed way to support our bodies after a looooong day. At Flewd Stresscare, we’re big fans of using transdermal (through the skin) treatments to help our bodies recover from the modern world’s nonsense.
In this article, we’re going to dive into why this duo works so well, how to get the ratios right, and why we should probably stop treating our bathtubs like just a place to wash our hair and start treating them like a recovery suite. This isn’t just a "self-care" moment; it’s a strategic replenishment of the nutrients stress steals from us.
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It might seem like a weird pairing—something from the back of the pantry meets a mineral often found in the supplement aisle. But the science behind combining these two is actually pretty solid. When we drop these into warm water, we’re creating a targeted environment for our skin to absorb what it needs while neutralizing the stuff it doesn't.
Magnesium is the undisputed heavy hitter of the mineral world. It’s involved in over 300 biochemical reactions in our bodies, including muscle function, nerve signaling, and energy production. The problem? Stress is a magnesium thief. When we’re stuck in a "fight or flight" loop, our bodies burn through magnesium stores at an alarming rate. This leads to the classic symptoms we all know: muscle tension, twitchy eyelids, poor sleep, and a general feeling of being "on edge."
At Flewd, we prioritize magnesium chloride hexahydrate because it’s the most bioavailable form for transdermal absorption. While most people are familiar with Epsom salt (magnesium sulfate), magnesium chloride is easier for our cells to pick up and use. It’s essentially a more efficient way to give our nervous systems the "calm down" signal they’re screaming for.
Baking soda, or sodium bicarbonate, isn’t just for making cookies or cleaning the fridge. In a bath, it serves a few critical purposes. First, it’s an alkaline substance. Our skin can become slightly acidic due to sweat, toxins, and environmental stressors. A baking soda bath helps balance the pH of the water and our skin, leaving it feeling soft rather than stripped.
Second, baking soda is incredible for neutralizing chlorine. If we’re filling our tubs with standard municipal tap water, we’re likely soaking in a fair amount of chlorine and other chemicals. Baking soda helps neutralize these elements so our skin can focus on absorbing the magnesium instead of fighting off tap water irritants.
Key Takeaway: Combining magnesium and baking soda creates a high-bioavailability environment that replenishes lost minerals while protecting our skin from the harsh elements of standard tap water.
We aren't just doing this for the aesthetic. There are real, tangible reasons why we should be mixing these two into our routine. When we soak for 15 to 30 minutes, we’re giving our bodies a chance to bypass the digestive system—which can be finicky and inefficient—and deliver nutrients directly to the bloodstream via the skin.
When we’re stressed, our muscles carry the weight. We get those knots in our necks and that tightness in our lower backs. A magnesium bath is a natural muscle relaxant. It helps regulate calcium levels in our cells; too much calcium causes muscles to contract, while magnesium helps them relax. Adding baking soda helps soothe any topical irritation that might be adding to our physical discomfort.
For those of us dealing with eczema, psoriasis, or just general "winter skin" itchiness, the baking soda and magnesium bath is a lifesaver. Baking soda is known for its ability to soothe itchiness and calm inflammation. It’s also antifungal, which makes it great for supporting foot health or clearing up minor skin irritations. When we combine it with magnesium, which supports the skin barrier, we’re looking at a serious glow-up for our largest organ.
We use the word "detox" carefully around here because our livers and kidneys are already doing the heavy lifting. However, a warm bath induces sweating, which is one of the ways our bodies eliminate heavy metals and metabolic waste. The minerals in the water stimulate this process, making our sweat session more productive. It’s less about "cleansing" and more about supporting the systems that are already working for us.
If we can’t turn our brains off at night, it’s often because our cortisol levels are too high. Magnesium is a precursor to neurotransmitters like GABA, which tells our brains it’s time to chill out. A soak before bed helps lower our core body temperature (once we get out) and raises our magnesium levels, making it way easier to fall—and stay—asleep.
What to do next:
Most people reach for the big bag of Epsom salts at the drugstore. While those are fine in a pinch, we think we can do better. Epsom salt is magnesium sulfate. It’s been used for centuries, and we respect the history, but science has moved on.
We use magnesium chloride because the molecular structure allows it to dissolve more completely and penetrate the skin more effectively. It’s the difference between a dial-up connection and high-speed fiber-optic internet for our cells. When we add baking soda to magnesium chloride, we’re creating a transdermal nutrient treatment rather than just a salty bath.
This is why our formulas, like the Ache Erasing Soak, are built the way they are. We don't just stop at magnesium. We add targeted vitamins like C and D and omega-3s to address the specific "why" behind the ache. If we’re dealing with the kind of stress that makes us want to hide under a weighted blanket for a week, we need more than just hot water. We need a concentrated delivery of the stuff stress has depleted.
Ready to jump in? Let’s talk logistics. We want to make sure we’re getting the most out of our soak without turning our bathrooms into a science experiment gone wrong.
For a standard-sized tub, we recommend:
This is a big one. We don’t want the water to be scalding. If it’s too hot, our bodies go into a different kind of stress response, and we might end up feeling dizzy or over-exhausted. We’re aiming for "warm and cozy," around 92°F to 100°F. This is the sweet spot that allows our pores to open up without stressing out our cardiovascular system.
We need to give the transdermal process time to work. A quick five-minute dip won’t cut it. We should aim for at least 15 to 20 minutes. This gives the magnesium enough time to actually pass through the skin barrier. If we can stay in for 30 minutes, even better. This is a great time to listen to a podcast, read a book, or just stare at the ceiling and contemplate why we ever thought adulting was a good idea.
One of the best things about a magnesium and baking soda bath is that we don't necessarily need to rinse off. The minerals continue to work on our skin even after we’ve dried off. However, if the salt feels a little itchy or we have suuuuuper sensitive skin, a quick lukewarm rinse is perfectly fine. The most important step is to hydrate. Bathing in salt and soda can be dehydrating, so drink a big glass of water afterward.
"A bath shouldn't just be about getting clean. It's about chemical replenishment. We're using the water as a medium to put back what the day took out of us."
At Flewd, we realized that stress isn't a monolith. Sometimes stress feels like a racing heart and a tight chest (Anxiety). Sometimes it feels like we’re made of lead and can’t get off the couch (Fatigue). Sometimes it feels like we want to fight a mailbox (Rage).
Because the baking soda and magnesium base is so versatile, it can be tailored to these different "moods."
While a DIY baking soda and magnesium bath is a fantastic baseline, these targeted formulas are designed to be a step above. They’re essentially a multivitamin for our bathwater.
While we’re fans of the soak, we also believe in being smart about it. Not everyone should be jumping into a high-mineral bath without a bit of caution.
If we have high blood pressure, heart disease, or diabetes, we should check in with a doctor before starting a regular "detox bath" routine. The heat and the minerals can affect circulation and blood sugar levels. It’s always better to be safe than sorry.
If we’ve got a significant cut, a fresh tattoo, or a serious skin infection, we should skip the soak. While baking soda is antifungal and magnesium can be healing, salt in an open wound is... well, it’s literally salt in a wound. It hurts, and it can irritate the area further.
We mentioned it before, but it bears repeating. Sweating in a warm bath pulls water out of our system. If we don’t replace it, we’re gonna end up with a "bath hangover"—that groggy, headache-y feeling that happens when we’re dehydrated.
For our pregnant friends, keeping the water temperature at a safe level is crucial. We should avoid anything that raises our core body temperature too high. A lukewarm magnesium and baking soda bath can be amazing for those third-trimester leg cramps, but keep the heat in check.
Consistency is where the magic happens. One bath is a nice treat. Two baths a week is a strategy. When we regularly replenish our magnesium and support our skin with baking soda, we start to notice that our "baseline" stress level shifts. We aren't as reactive. Our muscles don't feel quite as tight on Monday morning.
We’re essentially training our bodies to relax. In a world that demands we be "on" 24/7, taking 20 minutes to sit in a tub of mineral-rich water is a radical act of rebellion. It’s us saying that our well-being is more important than our inbox.
We didn't just stumble into making bath soaks. Flewd was born in 2020, right when the world decided to get suuuuuper stressful. We saw that people were struggling and that "self-care" had become just another thing on the to-do list. We wanted to create something that actually did something.
The Flewd Method is built on three pillars:
Whether we’re DIY-ing a baking soda and magnesium bath or using a pre-packaged Flewd soak, we’re participating in a ritual that has served humans for centuries. We’re just adding a little modern science to make sure it actually works.
You won't hear us talking about "Self-Care Sundays" or "finding your zen." We know that sometimes self-care is just trying to stop a panic attack in a bathroom stall. We know that stress is messy, loud, and inconvenient. We aren't here to give you a "game-changer" (ugh, we hate that word). We’re here to give you a tool that helps your body do what it was designed to do: recover and regulate.
Baking soda and magnesium aren't magic. They’re chemistry. And when we use chemistry to our advantage, we can start to feel a little more like ourselves again.
The combination of a baking soda and magnesium bath is one of the most effective, low-barrier ways to support our bodies through stress. By balancing the water’s pH, neutralizing chlorine, and delivering essential magnesium directly to our cells, we’re giving our nervous systems the support they need to finally take a breath.
The next time the world feels like a bit much, don't just reach for the wine or the remote. Reach for the magnesium and the baking soda. Your nervous system will thank you for it.
If we want to take things to the next level, our targeted soaks at Flewd are designed to handle the specific flavor of stress we’re dealing with. Whether it's the Anxiety Destroying Soak or the Fatigue Defeating Soak, we've got something that works as hard as we do.
For a standard bathtub, we generally recommend using 1 to 2 cups of magnesium flakes and about 1/2 to 1 cup of baking soda. If the goal is specifically to soothe very itchy skin or neutralize hard water, we can lean toward the higher end of the baking soda range. Always stir the water to ensure everything is fully dissolved before getting in. For more detail, see our guide on how much bath soak to use.
Generally, yes, these baths can be very soothing for children, especially for things like diaper rash or growing pains. However, we should use much smaller amounts—about 2 tablespoons of each for a toddler-sized tub—and always keep the soak time shorter (around 10 minutes). It's always a good idea to check with a pediatrician first.
It’s not strictly necessary to rinse off, as leaving the minerals on the skin can continue to provide benefits. However, some people find the salt residue a bit itchy or drying once it dries on the skin. If we have sensitive skin, a quick lukewarm rinse followed by a good moisturizer is a great way to finish the session.
Absolutely. Epsom salt and magnesium flakes are both solid options, and Epsom salt is magnesium sulfate. While we prefer magnesium chloride for its higher absorption rate, Epsom salt is a solid alternative that still provides the muscle-relaxing benefits of magnesium and the skin-soothing properties of the soda.
