Walk down the deodorant aisle and it just all feels so confusing, especially in Australia’s warm climate where sweating is part of everyday life.
On one side, you’ve got aluminium-based deodorants promising dry armpits all day. On the other, natural deodorants quietly saying, “Let your body do its thing.”
If you’ve ever stood there confused, you’re not alone. The difference between natural and aluminium deodorant isn’t always explained clearly.
So let’s break it down.
Quick summary
- Aluminium antiperspirants block sweat glands to reduce wetness
- Magnesium deodorants don’t block sweat, they absorb moisture and neutralise odour-causing bacteria
- Many people choose magnesium because it’s gentler on skin and supports natural body function
What Are Aluminium Deodorants?
Aluminium deodorant is technically an antiperspirant. Its job isn’t to manage odour. It’s to stop you from sweating.
Here’s how it works:
- Aluminium salts dissolve in your sweat
- They form a temporary plug inside the sweat duct
- Sweat can’t reach the surface
The result is dry underarms ...but where did all that sweat go?
Does Blocking Sweat Cause It to Come Out Elsewhere?
Sweating is part of your body’s natural cooling process. It helps regulate temperature, balance bacteria on the skin, and keep everything functioning as it should.
When you use an antiperspirant, aluminium salts temporarily plug your underarm sweat ducts to reduce moisture. Your body doesn’t stop producing sweat altogether... it simply redirects some of that cooling effort elsewhere.
This is known as compensatory sweating. Some people notice they start sweating more on their back, chest, face or scalp (especially in heat, during workouts or when stressed). When you repeatedly block sweat in one area, your body doesn’t just give up. It adapts. It finds another way to cool itself. (Hello… sweat butt)
Blocking it doesn’t eliminate odour. It just delays it. And sometimes, when the plug wears off, the smell can come back stronger. And all that sweat... it's just going to find another way out to cool itself.
You can delay sweat. But you can’t outsmart your biology.
How Are Natural Deodorants Different?
Natural deodorant doesn’t try to stop sweat. It recognises that sweating is normal. Healthy, even.
Instead of blocking your sweat glands like traditional aluminium antiperspirants, natural deodorants focus on one simple thing: managing odour. They adjust the pH of your underarms slightly so the odour causing bacteria can't thrive.
Most natural deodorants work by:
- Absorbing moisture (with ingredients like clays or starches)
- Neutralising odour-causing bacteria
- Supporting the skin’s natural balance
Because here’s the key point. Sweat itself doesn’t smell. It’s the bacteria breaking down sweat that creates body odour.
The Great Debate: Is Aluminium Deodorant Safe?
Many people wonder whether aluminium deodorant is harmful. The short answer is that for most people, aluminium-based deodorants are considered safe.
Research shows that only around 0.01% to 0.06% of aluminium applied to the skin is absorbed into the body.
However, there are a few important things to keep in mind:
- Aluminium deodorants are not recommended for people with advanced chronic kidney disease
- There is no clear evidence linking aluminium deodorants to breast cancer, but long-term research is still ongoing
- A true aluminium-free antiperspirant does not exist, as aluminium is what blocks sweat
Because of this, some people take a “better safe than sorry” approach, especially if they don’t feel the need to stop sweating completely.
Others choose to avoid aluminium due to:
- Skin sensitivity
- Irritation
- A preference for more natural body care
This shift in awareness is one of the reasons magnesium-based deodorants have become increasingly popular in Australia and globally.
Now, Not All Natural Deodorants Are Created Equal (This Is Where Magnesium Comes In)
Magnesium hydroxide is one of the gentler and more effective options for odour control. It works by:
- Neutralising the bacteria responsible for smell
- Helping maintain a balanced skin environment
- Allowing sweat without letting odour take over
So instead of shutting down your body’s cooling system, magnesium deodorant targets the cause of underarm odour.
It’s not about stopping sweat. It’s about managing what happens after it.
How to Use Magnesium Deodorant (And What to Expect)
If you’re switching from aluminium deodorant, your body may need a short adjustment period. If you’ve been blocking sweat for years, your underarms might take a week or two to rebalance.
During that time:
- You might sweat more at first
- Odour may fluctuate
- Reapplication might help
This is totes normal. Hang in there! Simply apply a small amount of natural magnesium deodorant to clean, dry underarms. Reapply if needed, especially during hot weather or stress.
Most people find that once their skin settles, irritation decreases and scent control improves naturally.
Why We Chose Magnesium Over Bicarb
When we were formulating our deodorant, the real decision wasn’t magnesium vs aluminium. It was actually magnesium vs bicarb.
Bicarb (sodium bicarbonate) is common in natural deodorants because it neutralises odour quickly. And for some people, it works well. But here’s what we kept seeing: skin irritation. Redness. Stinging. That uncomfortable rash that makes you question your life choices.
So we looked closer and three things made magnesium the better option:
1. Gentler on Skin
Bicarb is highly alkaline. That high pH can disrupt the skin barrier and throw off the underarm microbiome, especially for sensitive skin. Magnesium hydroxide is also alkaline, but significantly gentler and less reactive. Bicarb can also darken the skin of your underarms. No thanks!
2. Better Long-Term Balance
Instead of aggressively altering pH, magnesium helps neutralise odour-causing bacteria while keeping the skin environment more stable. Less drama. More consistency.
3. Sensitive-Skin Friendly
Many people who can’t tolerate bicarb-based natural deodorant find magnesium works without the burning or itchiness.
For a natural deodorant designed for everyday use in our Australian climate, magnesium simply made more sense.
If you’re looking for a gentle, effective option, our magnesium deodorant was designed specifically for sensitive skin and everyday use.
Recap: A Different Way to Think About Sweat
Sweat isn't the enemy. It's your body doing its job.
When we stop trying to silence it and instead focus on balance, everything changes.
Magnesium deodorant shifts the goal from "never sweat" to "stay fresh."
And that feels a lot more realistic.
Your armpits already know what they're doing. They just need the right backup.
Ellie (Chief Smell Officer) x
FAQs: Magnesium vs Aluminium Deodorant in Australia
+ Is magnesium deodorant better than aluminium deodorant?
Magnesium deodorant can be a better option for daily use if you prefer odour control without blocking sweat glands. Aluminium deodorant stops sweat, while magnesium manages the bacteria that cause smell.
+ Does aluminium deodorant block sweat glands?
Yes. Aluminium salts form temporary plugs in sweat ducts to reduce moisture. This keeps underarms dry but suppresses natural sweating.
+ Is magnesium deodorant safe for everyday use?
Magnesium deodorant is generally considered suitable for daily use because it works with your body's natural sweating process instead of blocking it. It focuses on odour control rather than sweat suppression.
+ Why does my deodorant stop working?
Over time, blocking sweat can disrupt the underarm microbiome. When this balance shifts, odour may become stronger or more persistent. Switching to a magnesium-based formula can help restore balance.
+ Does magnesium deodorant stop sweat completely?
No. Magnesium deodorant does not stop sweat. It allows natural perspiration while neutralising odour-causing bacteria.
+ Is natural deodorant in Australia effective?
Many people find that natural deodorants, especially magnesium-based formulas, provide effective odour control once the body adjusts. Consistent use and reapplication during hot weather can improve results.