Do Sprays and Oils Actually Work?

Magnesium sprays have basically taken over the wellness shelf. Spray it on before bed, spray it on after a workout, spray it on your feet, your stomach, wherever — the marketing makes it sound like a cure-all in a bottle. But does rubbing magnesium chloride onto your skin actually get magnesium into your body, or is this one of those trends that sounds better than it works?

Here’s the thing that trips people up straight away: it’s called “magnesium oil,” but there’s no oil in it at all. It’s magnesium chloride dissolved in water, and it just has an oily feel on the skin. Once you get past that naming confusion, the real question is whether your skin can actually absorb enough magnesium to make a difference.

It’s not technically an oil — so what is it?

Magnesium oil is a concentrated solution of magnesium chloride, usually sourced from ancient salt deposits or salt lakes. When you spray it on, it can feel slightly slippery, slightly tingly, sometimes a bit itchy if your magnesium levels are low or your skin is sensitive. That’s the “oil” part sorted — now onto whether it does anything.

Can your skin actually absorb magnesium?

This is genuinely debated. Some research suggests the skin can absorb small amounts of magnesium through hair follicles and sweat ducts, particularly with consistent use. Other studies argue that intact skin isn’t a great pathway for it and that oral magnesium is the more reliable route. The honest answer is: transdermal absorption is likely real, but modest, and it varies a lot from person to person depending on skin condition and how the product is used.

What most people report is more localised, though — using it on tight, sore muscles after training or before bed for a wind-down effect, rather than relying on it as their sole way of correcting a deficiency.

Why so many people still swear by it

Even without settled science on absorption levels, there are a few genuine reasons topical magnesium has stuck around:

• It’s easy. No pills to remember, no taste to mask, just a few sprays and rub it in.
• It targets the area you need it. Sore calves after a run, tight shoulders from sitting at a desk — you spray where it hurts.
• It’s a nice addition to a wind-down routine. A few sprays before bed, some rubbing in, and it becomes part of winding the nervous system down for the night, separate from any measurable magnesium bump.
• Sensitive stomachs prefer it. Oral magnesium (especially at higher doses) can cause digestive upset for some people. Topical sidesteps that entirely.

What the different formulas actually offer

Not all magnesium sprays are the same concentration, and that matters more than people realise.

Ancient Minerals Magnesium Oil Ultra with MSM is one of the most concentrated options on the shelf, delivering 55mg of elemental magnesium per ml alongside MSM, a sulfur compound often paired with magnesium for recovery-focused use. It’s a favourite with athletes for a reason — it’s strong, and the addition of MSM is aimed squarely at post-training recovery rather than general daily topping up.

Nature’s Help Pure Magnesium Oil Spray sits at the high-concentration end too, sourced from Australian salt lakes with a magnesium content around 30% — close to the ceiling before magnesium starts crystallising out of solution. No added water, no dilution, just the concentrated form.

If concentrated formulas feel too intense on the skin, SISUU Magnesium Recovery Spray is a gentler entry point, blending a 50% magnesium chloride solution with aloe vera, which helps soften the experience for anyone with reactive or sensitive skin. It’s positioned specifically around muscle recovery and sleep, and is genuinely non-sticky and fragrance-free, which matters if you’re using it right before bed.

AMAZING OILS Magnesium Daily Spray is built for daily, low-fuss use — the kind of product you leave on the bathroom bench and use morning and night without thinking too hard about it. Their approach is a few sprays upper body in the morning, lower body at night, keeping it simple as a daily top-up rather than a targeted recovery treatment.

So, does it work?

If the question is “does it replace oral magnesium or fix a diagnosed deficiency,” the honest answer is probably not on its own. But if the question is “does it help sore muscles feel better, does it fit nicely into a wind-down routine, does it avoid digestive issues some people get with oral forms” — then yes, there’s a real place for it.

Final Thoughts

Topical magnesium isn’t a miracle, and it isn’t nothing either. It sits somewhere in the middle — a genuinely useful tool for targeted relief and a low-effort daily habit, even if the absorption numbers aren’t fully settled. Like most things in this space, it comes down to matching the product to what you actually need it for: recovery, sleep, sensitive skin, or just an easy daily habit.

Not sure which magnesium spray suits you? Browse our full range here or chat to one of our naturopaths for a recommendation based on your goals.