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£15.00
Ancient Minerals Magnesium Oil Original is a topical magnesium chloride spray designed to deliver magnesium directly through the skin.
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Ancient MineralsMagnesium Oil Original - Spray Bottle
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Ancient Minerals Magnesium Oil Original is a topical magnesium chloride spray designed to deliver magnesium directly through the skin. Despite the name, it contains no oil — the term refers to the slick, oily texture that a concentrated magnesium chloride solution produces on contact with skin. Transdermal application bypasses the digestive tract entirely, which may suit people who find oral magnesium supplements cause loose stools at the doses they need.
Magnesium is involved in hundreds of enzymatic processes: muscle contraction and relaxation, nerve signalling, and normal energy metabolism. Applying it topically to areas of tension — calves, shoulders, the soles of the feet — is a practical way to incorporate magnesium into a recovery or wind-down routine.
This spray is well suited to athletes managing muscle fatigue, people who struggle with oral supplementation, or anyone looking to support relaxation before sleep. It fits easily into an evening routine applied after a shower, when the skin is warm and pores are open.
Ancient Minerals sources its magnesium chloride from the ancient Zechstein seabed in the Netherlands, a deposit formed over 250 million years ago and considered exceptionally pure due to its geological isolation. The formulation contains no synthetic additives beyond the active ingredient, keeping it straightforward for those with sensitive skin or a preference for minimal ingredient lists.
Magnesium Chloride

Spray directly onto clean skin — common sites include the legs, arms, abdomen, and soles of the feet. Leave on for at least 20 minutes before rinsing if desired. A mild tingling sensation is normal, particularly on freshly washed or sensitive skin; diluting with water or applying after moisturiser can reduce this.
No. The product contains no oil. Magnesium chloride in a concentrated solution has a slick, oily feel on the skin, which is where the name comes from. The formula is simply magnesium chloride and water.
Oral magnesium, particularly at higher doses, can cause loose stools in some people. Applying magnesium transdermally bypasses the gut entirely, which may allow you to achieve your target intake without that side effect. It is also easy to apply directly to areas of muscular tension.
Yes, a mild stinging or tingling is common, especially on freshly washed or sensitive skin. It typically fades with regular use. Diluting the spray with a little water, or applying it over a light moisturiser, can reduce the sensation.
Many people apply it in the evening after a shower, when skin is warm and circulation is good. Applying to the legs and feet before bed fits naturally into a wind-down routine and may support relaxation and sleep quality.
Those with broken, irritated, or very sensitive skin should patch-test first, as the concentrated solution can cause discomfort. If you have a kidney condition that affects magnesium excretion, speak to your GP before adding any magnesium supplement — topical or oral.
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Overall Sentiment
5 months ago
I spray this on my calves and the soles of my feet about 20 minutes before bed. Took a couple of weeks to notice a difference but now I'm genuinely waking up feeling more rested. I'd been taking oral magnesium for years and had the usual stomach issues at higher doses — this sidesteps that entirely. Reordered twice already.
6 months ago
Use it on my calves after long training runs. Legs feel less tight the next morning. Simple product, does what it promises.
6 months ago
Really happy with the results — I've been sleeping better and my shoulder tension has eased up. Only reason it's four stars is the stinging/tingling sensation when you first apply it. It's quite intense on freshly showered skin. I now wait a bit longer after my shower and dilute it slightly, which helps. Might be worth mentioning this more prominently on the label.
7 months ago
Switched from an oral supplement that was wrecking my stomach. This is so much easier. Spray on, leave it, done.
7 months ago
I was sceptical about transdermal magnesium but a friend who's a physio recommended I give it a go. A few sprays on my shoulders and neck after my shower most evenings. I can't make big claims about what exactly it's doing but I do feel calmer going to bed, and I've stuck with it for about three months now which is more than I can say for most supplements I've tried.
8 months ago
The magnesium itself seems good — I've noticed less cramping during my evening runs and I sleep more soundly when I remember to use it. My gripe is purely practical: the spray pump is a bit flimsy and has started to stick after a couple of months of use. Slightly annoying for the price. Will buy again but hoping they upgrade the bottle.
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