Magnesium Foot Soaks: Benefits, Uses, and Does the Evidence Hold Up?
Magnesium Foot Soaks: Benefits, Uses, and Does the Evidence Hold Up?
By Sylke Bommel · Updated August 2026 · 6 min read
Key Takeaways
- A magnesium foot soak is warm water combined with magnesium salts, used to relax tired feet and soften skin
- The relaxation and skin-softening effects are well supported, but claims that meaningful amounts of magnesium are absorbed through skin remain scientifically unproven
- Pregnant women showed significant reduction in foot swelling using Epsom salt (magnesium sulfate) foot soaks in a controlled clinical trial
- Warm water alone, independent of magnesium content, already relaxes muscles and softens skin
- Anyone with open cuts, diabetic foot complications, or kidney disease should check with a doctor before regular magnesium soaks
What Is a Magnesium Foot Soak?
A magnesium foot soak is a warm water bath dissolved with a magnesium salt, most commonly magnesium sulfate (Epsom salt) or magnesium chloride, used to relax the feet and soften rough skin.
The ritual is simple: dissolve the salt or oil in warm water, soak the feet for fifteen to twenty minutes, then pat dry. Many people find it a genuinely relaxing end-of-day routine, whether or not the magnesium itself is doing extra work.
What Are the Claimed Benefits?
Magnesium foot soaks are commonly used for muscle relaxation, easing tired or achy feet, softening dry skin, and reducing mild swelling.
Some of these benefits come from the warm water itself, which increases local blood flow and softens the outer skin layer regardless of what is dissolved in it. Others are attributed specifically to magnesium reaching muscle tissue or the bloodstream through the skin.
What Does the Research Actually Show?
The evidence for meaningful magnesium absorption through the skin is weak, while the evidence for symptom relief, particularly swelling reduction, is more encouraging.
A 2017 review in the journal Nutrients examined the available research on transdermal magnesium and concluded that the science does not yet support claims that skin application raises body magnesium levels; the authors stated they could not recommend transdermal magnesium as a treatment for magnesium deficiency.
Separately, a randomized controlled trial in pregnant women found that a magnesium sulfate (Epsom salt) foot soak reduced foot swelling significantly more than foot exercises alone. This suggests a real, measurable local effect on swelling, even without proof that magnesium itself is being absorbed into the bloodstream in meaningful amounts.
Who Should Be Cautious?
Most healthy adults can use magnesium foot soaks safely, but certain groups should check with a doctor first.
People with diabetes, especially with any nerve damage or reduced sensation in the feet, should be cautious with hot water soaks since they may not accurately feel water temperature and risk burns. Anyone with kidney disease should also check with a doctor, since impaired kidneys are less able to regulate magnesium levels. Open wounds, active skin infections, or fresh cuts are also reasons to skip a soak until healed.
How to Use a Magnesium Foot Soak
For a basic soak, dissolve magnesium salt or a few sprays of magnesium oil into warm, not hot, water and soak the feet for fifteen to twenty minutes.
Test water temperature with your hand first, particularly if you have any reduced sensation in your feet. Pat feet dry afterward rather than rubbing, and follow with a moisturizer to lock in the softening effect on the skin.
Imperial Feet's Magnesium Oil is a convenient way to add magnesium to a foot soak or apply it directly to the skin after bathing, without needing to measure out bath salts.
Setting Realistic Expectations
A magnesium foot soak is best framed as a relaxing self-care ritual with a plausible local benefit for swelling and skin softness, not a proven way to correct a magnesium deficiency.
If you suspect you are magnesium deficient, oral supplementation and dietary sources have far stronger clinical evidence behind them, and that conversation is worth having with a doctor rather than relying on skin application alone.
73.75%
reduction in foot swelling among pregnant women using an Epsom salt foot soak in a controlled trial (Macwan & Savaliya, J Clin Diagn Res, 2021)
Before You Start Regular Magnesium Soaks
- ✓Check with a doctor if you have diabetes with reduced foot sensation
- ✓Check with a doctor if you have kidney disease
- ✓Skip soaking over open cuts or active skin infections
- ✓Use warm, not hot, water and test the temperature by hand first
- ✓Don't rely on soaks alone to correct a suspected magnesium deficiency
ℹ️ Good to know: Claims that foot soaks meaningfully raise your body's magnesium levels are not well supported by current research; the relaxation and skin-softening benefits are the most evidence-backed reasons to soak.
Magnesium Oil
Imperial Feet's Magnesium Oil is a simple way to add magnesium to a warm foot soak or apply directly to the skin for a relaxing end-of-day routine.
View Magnesium OilFrequently Asked Questions
Do magnesium foot soaks actually raise magnesium levels in the body?
The current research does not clearly support this. A 2017 review of transdermal magnesium studies concluded the evidence was insufficient to recommend skin application as a way to correct magnesium deficiency, so oral intake remains the better-supported route.
Can magnesium foot soaks help with swollen feet during pregnancy?
A randomized study of pregnant women found Epsom salt foot soaks reduced foot swelling significantly more than foot exercises alone, so there is real clinical support for this specific use, separate from the absorption debate.
How long should you soak your feet in a magnesium bath?
Fifteen to twenty minutes in warm, not hot, water is a typical duration, followed by patting feet dry and moisturizing to help lock in the skin-softening benefit.
Is Epsom salt the same as magnesium oil?
No. Epsom salt is magnesium sulfate dissolved in water for a soak, while magnesium oil is a concentrated magnesium chloride solution that can be sprayed directly on skin or added to a foot bath; both are used for similar relaxation purposes.
Who should avoid magnesium foot soaks?
People with diabetes and reduced foot sensation, kidney disease, or open wounds or active skin infections on the feet should check with a doctor before starting regular magnesium soaks.
Clinical Sources
- Gröber U, Werner T, Vormann J, Kisters K. Myth or reality, transdermal magnesium? Nutrients. 2017;9(8):813. doi:10.3390/nu9080813.
- Macwan KR, Savaliya PK. Effectiveness of Foot Exercise and Epsom Salt Water on Reduction of Foot Oedema among Antenatal Mothers. J Clin Diagn Res. 2021;15(5):LC23-LC26.
- Kass L, Rosanoff A, Tanner A, Sullivan K, McAuley W, Plesset M. Effect of transdermal magnesium cream on serum and urinary magnesium levels in humans: A pilot study. PLoS One. 2017;12(4):e0174817.
- Watkins K, Josling PD, topical magnesium absorption studies (University of Birmingham, Waring RH), as reviewed in Gröber U, et al. Myth or reality, transdermal magnesium? Nutrients. 2017;9(8):813.
Related Reading
- Do you know the causes of foot odor? Get rid of it once and for all!
- Muscle fatigue, causes, and how to get you back on your feet!
- How to increase blood flow on your feet?
Owner, Imperial Feet — Third-Generation Foot Care
Sylke Bommel is the owner and third-generation leader of Imperial Feet, the Dutch professional foot care brand her grandfather founded in 2001. Raised in Aruba and based in Haarlem, just outside Amsterdam, she has led the brand's international expansion for over a decade, growing Imperial Feet from a single Dutch distributor to a professional range used by pedicurists, podiatrists, and pharmacies in more than 20 countries, including the United States.
Editorial note: Sylke writes from the perspective of a foot care brand owner and formulator, not a medical practitioner. Content is educational and does not replace individual medical advice from a qualified foot care professional.
Disclaimer: This article is for informational purposes only and does not replace individual medical advice from a qualified foot care professional. If you have diabetes, poor circulation, or a persistent infection, consult a podiatrist before self-treating.
