Aluminium in Deodorant and Antiperspirant: What the Science Actually Says

Is the aluminium in deodorant and antiperspirant safe, and what does it actually do? It's a question that keeps coming back year after year, and one that has never quite been put to rest. So let's look at what the research has actually shown, and what follows from it.

What Aluminium Does in Deodorant

First, a clarification: aluminium isn't really a deodorant ingredient at all — it's an antiperspirant one. An antiperspirant works by using aluminium salts to plug the ducts of your sweat glands, which reduces sweating and keeps your underarms dry. The whole principle rests on physically blocking the gland, which means it isn't tackling odour at all — it's tackling moisture. So when a product labelled "deodorant" contains aluminium, it's really working as an antiperspirant.

Does It Absorb Through the Skin?

It does, but only in small amounts, especially when you apply it to freshly shaved skin. On its own that's negligible and not something anyone would need to worry about. The catch is that this isn't a one-off exposure — we apply it every single day, often for years.

What the Studies Show

The most frequently cited study is a Geneva paper from 2016 (Mandriota et al., International Journal of Cancer). The researchers took mouse mammary cells and exposed them to aluminium chloride at concentrations that are actually measured in human breast tissue. Those cells then turned cancerous, and once injected into mice they formed tumours and metastases, while the control cells that received no aluminium stayed normal.

It sounds fairly alarming, but there's one detail that natural-deodorant marketing tends to leave out — the tumours grew mainly in mice with severely weakened immune systems. That's precisely why experts cautioned that it tells us very little about real-world risk for an ordinary person, and epidemiological studies in women have found no link to cancer to this day.

Did Switzerland Ban Aluminium in Deodorants?

Fact: It hasn't. Switzerland has never banned aluminium in deodorants or antiperspirants — but it did hold a parliamentary debate about it, and that debate is where the myth comes from.

In May 2014, Green MP Aline Trede submitted postulate 14.3344, "Keine Deodorants mit Aluminium" ("No deodorants containing aluminium"), in the National Council. It wasn't a draft law: it asked the Federal Council, the Swiss government, to examine a ban on deodorants containing aluminium salts and report back, citing studies that pointed to a possible link with breast cancer. On 16 June 2016, the National Council rejected it by 113 votes to 66, with 4 abstentions.

The question didn't go away. A second postulate, 16.3762, asked the government to look at warning labels and, once again, at a possible ban. The National Council adopted it in May 2017 — which is where headlines about a "Swiss ban" came from. The Federal Council delivered its report in July 2020: no causal link between aluminium on the skin and breast cancer had been shown, and the existing legal framework was judged sufficient. No ban followed.

Today, the Federal Food Safety and Veterinary Office (FSVO) states that there is no scientific evidence of a causal link between aluminium on the skin and breast cancer, and that antiperspirants on the Swiss market are regulated and safe. It bases this on the work of the EU's Scientific Committee on Consumer Safety, whose latest opinion (2024) considers aluminium safe in antiperspirants within set maximum concentrations. The EU has since written those limits into law in Regulation (EU) 2026/909.

So the Swiss story isn't evidence of harm, and we don't present it as such. Going aluminium-free is simply a different approach to the same everyday problem: ZINDEO focuses on odour, working with your underarm microbiome instead of blocking natural sweating. For a closer look at the common misconceptions about aluminium-free products, read Aluminium-Free Deodorant: Myths and Facts.

Why People Switch to Aluminium-Free Anyway

In most cases it's precisely because of that doubt, not out of a fear of cancer, which hasn't been proven. It comes down to a simple line of thinking — I'm rubbing something into my underarms every morning, for years, often right after shaving, and I have no real certainty that it's entirely without consequences. And once there's an aluminium-free option that takes care of odour, there's little reason to keep living with that doubt.

Where ZINDEO Comes In

ZINDEO isn't an antiperspirant, nor an ordinary deodorant — it's an anti-odorant. It doesn't plug your glands and it doesn't cover odour with fragrance; instead it works with your underarm microbiome. It supports the skin microbiome while targeting the bacteria associated with body odour.

Fragrance-Free cream tested on the skin microbiome — documented results, not just a marketing "natural" label
Clinically tested for odour control by the independent testing laboratory J.S. Hamilton Poland (2026)
Aluminium-free; the Fragrance-Free cream has no added fragrance, essential oils, alcohol or baking soda, and 25 of 25 volunteers had no skin reaction in a dermatological patch test
Refillable cream jar — you buy the refill, not a new jar every time

RESET SET MAX — our most complete routine. SALSOAP® + Roll-on + Cream. The best choice when you're switching from an antiperspirant.
Try RESET SET MAX →

Moisture or Odour — Which Are You Actually Solving?

Science hasn't shown that aluminium antiperspirants are harmful, but it may simply be worth framing the question differently. An antiperspirant deals with moisture, whereas most of us are really dealing with odour — and for that, there's genuinely no need to plug your sweat glands. With ZINDEO you stay fresh without the aluminium. Every option is in our aluminium-free deodorant collection.

Sources

Newer
Older