Frequently Asked Questions
Here we answer recurring questions about applying magnesium to the skin. Where it helps, the answers link through to the detailed topic pages for the scientific background.
Have a question about applying magnesium through the skin that is not answered here? You can reach us via the contact form. Questions about your personal supply, however, can only be answered by qualified medical professionals — not by a website.
What is “magnesium oil”?
“Magnesium oil” is not an oil but a saturated magnesium chloride solution in water, at a concentration of around 31 percent. The name comes solely from the oily feel on the skin — the solution has nothing to do with fat or oil in the usual sense.
How much magnesium is absorbed through the skin?
The extent of absorption through the skin is the subject of several studies that differ considerably in scope and in how much they can show. We report them as they were published — they describe the state of the research, not the effect of a product.
Why apply it through the skin rather than as a tablet?
With external application the digestive tract is not involved, and the amount can be dosed individually to the area of skin. This is of particular interest to people who react to even small oral doses with stomach discomfort. The two routes can also be combined.
What dosage forms are there?
Three forms are mainly used for application through the skin: the liquid solution as a spray or “oil”, a thickened gel for massaging in, and bath flakes for full and foot baths. They differ above all in their magnesium content.
There is a slight tingling or itch on the skin — is that normal?
On sensitive skin, a slight tingling or itch can occur after application. This is a known reaction to the concentrated solution. If you find it unpleasant, you can dilute the solution with water or wash it off after about twenty minutes of application time; the skin usually becomes accustomed to it.
Do I need to wash the magnesium off?
That is not necessary. If you do wash the solution off, allow it about twenty minutes of application time first.
Can I combine external application with magnesium tablets?
Yes. Whether and to what extent that makes sense depends on how well oral absorption works for you individually. Questions about your own supply can only be answered individually and with knowledge of your state of health — please discuss this with your doctor.
Can you absorb too much magnesium through the skin?
How much magnesium is absorbed through the skin has not been conclusively established, so no reliable upper limit can be given. With severe kidney dysfunction and certain heart or muscle conditions, magnesium should generally only be used after consulting a doctor — this applies to external as well as oral intake.