Your skin's top layer exists to keep things out, and magnesium is a charged mineral that hangs on to water. That is the whole argument against rubbing it on. So does topical magnesium absorb through the skin or not?
The short answer: Yes, magnesium can get into the outer layers of your skin. A lab study at the University of Queensland found that magnesium crossed the skin's outer barrier. More got through the longer it stayed on and the stronger the product was. Hair follicles did much of the work. The human research is small, so I keep the claim simple: a magnesium balm works right where you put it.
By Dr. Doug Strobel, MD, a board-certified neurologist who formulated Dr. Doug's balms. Last reviewed October 13, 2026.
Why does the internet say yes and no?
The internet says both "yes, totally" and "no, never," so if you feel confused, you did nothing wrong. In clinic, people hand me the bottle and ask the same thing. I read the research for them the way I'd read it for anyone, and this post keeps three things apart: what lab studies show, what human studies show, and what nobody has shown yet.
What does the lab research show about magnesium and skin?
The best lab evidence says magnesium does cross the skin's outer layer, and hair follicles are the main shortcut.
Your skin's top layer is built to keep things out. Doctors call it the stratum corneum. Magnesium carries an electric charge and holds water around it. That makes it hard for magnesium to slip through the fatty layers between skin cells. For years, that was the main argument against topical magnesium.
In 2016, researchers at the University of Queensland tested it right on human skin samples. They put on a magnesium solution and measured how much moved through. Magnesium did get through the outer layer. The amount depended on how strong the solution was and how long it stayed on. Hair follicles, the tiny openings hairs grow from, did a big share of the work (Chandrasekaran, Magnesium Research, 2016).
That last finding matters for how you use it. Your calves, forearms and thighs have lots of follicles. They give magnesium more doorways than your palms or the soles of your feet.
A 2026 study from the University of Copenhagen asked a different question. Does magnesium pass all the way through the skin? The researchers used pig skin and a magnesium sulfate solution. Very little magnesium came through intact skin over 24 hours. It was no more than in untreated skin. Skin with its outer layer stripped off let far more through. They concluded that the skin's outer layer strongly limits magnesium. Getting it through intact skin and into the body from a simple water solution is unlikely. That fits how I describe a balm. It works right where you put it. It is not a way to raise your body's magnesium.
What do human studies show?
Only a few small human studies exist, and none is big enough to settle the question.
The one quoted most is a 2017 pilot study from the University of Hertfordshire. Twenty-five adults used either a magnesium cream or a placebo cream, one with no magnesium, every day for two weeks (Kass, PLoS ONE, 2017). The authors called it a pilot. Most of their results were too small to count as real, what scientists call not statistically significant. They asked for bigger and longer studies. My name is Dr. Doug Strobel, MD. I am a board-certified neurologist, and I don't use this study to claim anything about blood levels, either way. Be wary of any brand that does.
There is also a well-known skeptical review. In 2017, Gröber and colleagues looked at the research. They said the case for magnesium through the skin as a replacement for magnesium by mouth was not backed by science (Gröber, Nutrients, 2017). I think that is a fair reading for fixing a shortage. If your doctor finds low magnesium on a blood test, the answer is food and, if needed, a supplement you swallow.
So where does that leave a balm? Right where I started. The lab work shows magnesium gets into the skin. The human work is too small to say much more. That is why I call a magnesium balm something that works right where you put it, not a supplement you rub on.
Topical vs oral magnesium: which job is each for?
Oral magnesium is for your whole-body intake. Topical magnesium is for the spot you're massaging.
| Question | Oral magnesium (pill or powder) | Topical magnesium (balm, cream, oil) |
|---|---|---|
| Main job | Raising whole-body intake when diet falls short | Targeted use on calves, feet, shoulders, neck |
| Strength of evidence | Large body of research on intake and deficiency | Lab studies plus small human pilots |
| Common downside | Loose stools or stomach upset at higher doses | Tingling or sting with some sprays and oils |
| Best form | Glycinate or citrate are well tolerated | Magnesium chloride is the form used on skin |
| Who decides the dose | You and your doctor, by milligrams | You, by area covered. A little goes a long way |
Many people use both for different jobs. For a deeper look at the forms, see magnesium glycinate vs citrate vs chloride.
Why magnesium chloride is the form used on skin
Magnesium chloride dissolves easily, which makes it the best form for topical magnesium. It is the form in most topical magnesium products, including mine. I made a magnesium balm for my clinic patients and for myself first. I wanted to formulate a product unlike others on the market. My goal: the most magnesium chloride possible that still absorbs in completely, with no sting and no grit, in a handful of clean, non-toxic ingredients. Only goodness and nourishment that truly helps. The magic happens when you massage it in completely.
Epsom salt is magnesium sulfate, which is meant for a bath, not a rub on one spot. Glycinate and citrate are great forms to swallow, but they are not made for skin.
Where is the best place to put topical magnesium?
Put it where you want to feel it, on skin with lots of hair follicles: calves, shins, thighs, forearms, shoulders and the back of the neck.
My balm is magnesium chloride in olive oil, coconut oil, beeswax and shea butter, with peppermint and lavender essential oils and vitamin E. It comes as a 2.5 oz twist-up stick, an 8 oz jar and a 0.5 oz mini.
How long does topical magnesium take to work?
Most people notice the feel of it right away: the massage and the softer skin. Nobody has measured a clear timeline for anything beyond that.
The Queensland study found that more got in the longer it stayed on the skin. That is one reason a balm that stays put and rubs in fully makes more sense to me than a spray you wipe off. Be wary of anyone who promises a set number of minutes or days.
What I'd like to see researched next
The biggest gap is bigger, longer human studies. The Hertfordshire authors asked for exactly that: higher doses, longer use, more people. Until those exist, I'll keep telling you what we know and let you decide.
How to use topical magnesium: pick, rub, repeat
- Pick your spot. Somewhere with plenty of hair follicles: calves, shins, thighs, forearms, shoulders or neck. Start small. Most people use too much.
- Rub it in. Cover the spot plus about 5 inches above, below and all the way around it. Massage until it disappears.
- Repeat. Any time works: before a run, after a run, at your desk or winding down at night. There's no required timing. Skip broken or irritated skin, and keep it away from your eyes.
Picture two quiet minutes on your calves after a long day. No sting, no white film, nothing on your hands, just legs that feel looked after.
Related reading
- Magnesium Cream vs Pills: Which Should You Use (and Can You Use Both)?
- Is Magnesium Balm the Same as Magnesium Lotion? A Neurologist Explains the Difference
- Magnesium Cream for Leg Cramps: Does Topical Work Better Than Oral?
Frequently asked questions
Does magnesium absorb through the skin?
Magnesium gets into the outer layer of the skin, mostly through hair follicles, according to a 2016 lab study on human skin. A 2026 lab study found very little passes all the way through intact skin, so the accurate claim is that topical magnesium works right where you put it.
Does magnesium lotion absorb through the skin?
Magnesium lotion absorbs into the skin you massage, and lab work shows more magnesium enters with higher concentration and longer contact.
Can magnesium be absorbed through the skin in a bath?
A warm bath relaxes you, and that is the part we can count on. A 2026 lab study using a magnesium sulfate solution, the salt in Epsom baths, found very little magnesium passed through intact skin in 24 hours, so a bath has not been shown to raise the body's magnesium.
How long does topical magnesium take to absorb?
Lab work showed more magnesium got into the skin the longer it stayed on, so a balm you massage in fully and leave on is a sensible format. No study has set a reliable timeline beyond that.
Is topical magnesium better than oral?
Topical and oral magnesium do different jobs, so neither one is better. Oral magnesium raises whole-body intake, and topical magnesium is for the area you massage, so many people use both.
Where is the best place to put topical magnesium?
The best place to put topical magnesium is skin with plenty of hair follicles where you want to feel it: calves, shins, thighs, forearms, shoulders and neck.
Can topical magnesium fix a magnesium deficiency?
A magnesium deficiency is fixed with food and, if your doctor agrees, an oral supplement. Topical magnesium has not been shown to do that job, so if a blood test shows low magnesium, talk with your doctor.
Sources
- Chandrasekaran NC, et al. Magnesium Research, 2016. PMID 27624531
- Kass L, et al. PLoS ONE, 2017. PMID 28403154
- Gröber U, et al. Nutrients, 2017. PMID 28788060
- Camili V, Stürup S, Heinz A. Does magnesium permeate the skin? An ex vivo investigation of magnesium ion delivery through intact and barrier-disrupted skin. European Journal of Pharmaceutics and Biopharmaceutics, 2026. PMID 42372834
This article is educational and is not medical advice. Dr. Doug's products are cosmetic and are not intended to diagnose, treat, cure or prevent any disease.