Why Does Topical Magnesium Sting!

Why Does Topical Magnesium Sting? - A Pretty Place to Play, London Running and Fitness Blog

Magnesium is one of the most important minerals when it comes to sport performance. It plays a fundamental role in optimal muscle contraction, skeletal strength and energy production, as well as helping to sustain the high oxygen consumption that we need to perform. A growing number of studies suggest that magnesium is most effectively absorbed when applied to the skin (something called transdermal absorption) in comparison to taking it in pill or capsule form orally. That sounds really nerdy doesn’t it! Well let’s put it this way, applying a magnesium oil or gel to your legs will help you recover more quickly that popping a magnesium supplement each day. But there is one major drawback…IT STINGS LIKE HELL.

Why Does Topical Magnesium Sting? - A Pretty Place to Play, London Running and Fitness Blog

For ages I thought that it was just me who felt like their legs were on fire after applying magnesium, but chatting with other runners (which is pretty much all I do these days) I discovered that a lot of people have had the same experience, and it’s really putting them off doing something that’ll really benefit their bodies. Being someone whose job is essentially to ask ‘why’ a lot I really wanted to understand why topical magnesium stings so much, and whether there was anything I could do to stop the stinging, so I reached out to the team at BetterYou to ask some questions.

Why Does Topical Magnesium Sting? - A Pretty Place to Play, London Running and Fitness Blog

According to NPD Executive and Nutritional Expert, Keeley Berry, high dose magnesium can sting because it’s highly concentrated salt and it’s absorbed super quickly. While this has huge benefits when it comes to helping you recover, it can also mean that you’re left with a bit of residue on your skin which can cause some itching, especially if you’ve got sensitive skin (hands up!). Stinging or burning could also be a sign of magnesium deficiency, and when the skin is exposed to topical magnesium it can cause the blood vessels underneath the skin to dilate very quickly. This is because magnesium is a natural vasodilator and can cause the capillaries to increase in blood flow, also causing a tingling warming effect.

So that’s the science explaining why topical magnesium can sting, but what can you do about it? Here’s a few suggestions:

  • it’s always better to apply little and often to a larger surface area, especially if you’re just starting out with a magnesium oil.

  • the best way to avoid itchy residue to to apply gel or oil onto wet skin straight out of the shower. Warm water (not too hot!) helps open up the pores and allows the product to be absorbed more efficiently, especially when massaged into the skin. After a few minutes towel off any residual oil, which should help minimise any itching.

  • Noushii (the bad ass manager at City Athletic) suggests starting with the sensitive oil from BetterYou, it’s just a bit kinder if you have sensitive skin.

  • Try adding magnesium flakes to your bath, I’ve never experienced stinging, and who doesn’t like a good soak?! I like to add a couple of drops of essential oils too, just to make things a bit more lux.


Do you use topical magnesium? Do you find it stings? Any tips I’ve missed to stop the sting?!

* I reached out to BetterYou for comment, I have not received payment and the products features I purchased myself. My shoes were a gift from 361 Europe.

** images: Anna Rachel Photography