Do your deodorants contain aluminum salts?

We do everything we can to avoid leaving marks on our favorite blouse, and we don't leave the house without deodorant (or antiperspirant) anymore. But, like many people, you may have wondered about the aluminum salts in antiperspirants. We'll tell you everything.

What are aluminum salts?

They can be aluminum chlorohydrate or potassium alum, such as alum stone. That is the first surprising fact: the famous alum stone sold as a natural alternative is also an aluminum salt, which functions as an antimicrobial but not as an anti-sweat agent. At Yves Rocher, we use aluminum chlorohydrate in our antiperspirants for its antimicrobial AND anti-sweat (antiperspirant) power. They are used in antiperspirants to control sweat output. In short: they are what prevent moisture stains on clothes.

We also have versions without aluminum. We explain when to use each one below.

How do they work?

When dissolved on the surface of the skin, they form a gel that temporarily plugs the ducts through which sweat exits, the channels of the sweat glands. Result: you sweat less.

And the odor? Here is the second fact that almost nobody knows: sweat comes out practically odorless. The bad odor appears afterward, when the bacteria that live in the armpit transform it. Since aluminum salts also function as antimicrobial agents, they control those bacteria on the skin's surface and, as a bonus, you smell less.

That is why there are only two possible strategies: reduce sweat or stop the bacteria. That is the whole difference between the two products.

Antiperspirant and deodorant: how to tell which is which

If you are coming from an antiperspirant and switching to a deodorant, there may be a few days of adjustment. It's not that it doesn't work: it's that it does something else.

Why is this topic talked about so much?

Aluminum salts have been singled out due to a suspicion: that they might influence the appearance of breast cancer. Why? Because the area where they are applied, the armpit, is close to the breast.

To date, no serious scientific study has established a formal link between the use of an antiperspirant and breast cancer. This is confirmed by the two institutions that have reviewed it the most:

• The U.S. National Cancer Institute concludes that there is no scientific evidence linking these products to breast cancer.
• The American Cancer Society (reviewed June 2026) points out that the evidence is limited, and cites a study in which the skin absorbed barely 0.012% of the applied aluminum, much less than what is ingested through food.

Regarding the other hypothesis, Alzheimer's: it arose from observational studies that reported aluminum in the brains of some patients, but it was ultimately debunked. The Alzheimer's Drug Discovery Foundation summarizes that there is no consistent or convincing evidence associating aluminum with the disease.

They are not prohibited. But based on the precautionary principle, since 2011 the ANSM (the French National Agency for the Safety of Medicines and Health Products) recommends not using them on broken skin—shaved or depilated—for 24 hours. At the end of 2019, and in its final opinion of March 2020, the European Scientific Committee on Consumer Safety (SCCS) reaffirmed the safety of using aluminum salts in antiperspirants, and concluded that what daily-use cosmetics provide does not add significantly to the aluminum that the body already receives through other means. The main one is diet.

What is real and that is why it is in the package instructions:

• Freshly shaved or depilated skin: wait 24 hours.
• Irritated or wounded skin: do not apply. If irritation appears, stop using it.
• Kidney disease: the kidney is what eliminates aluminum. If this is your case, consult your doctor.

In summary: the available evidence does not support that the aluminum in antiperspirant is harmful to a healthy person. And if you prefer not to use it, that is a perfectly valid preference: that is what deodorant is for. The choice is of function.

And at Yves Rocher?

Two 48H antiperspirants, with aluminum chlorohydrate, for those who want dry armpits:

• Breton Algae, with Corallina officinalis extract, a red alga from the Breton coast. Aquatic scent.
• Organic Chamomile from La Gacilly, with Roman chamomile floral water. Soft floral scent.

Both are gentle emulsions with glycerin and dicaprylyl ether, without ethyl alcohol, which is why they feel creamier. They do not leave marks on clothes and are tested under dermatological control.

Two 24H deodorants without aluminum salts, with 98% ingredients of natural origin:

• Organic Mint from La Gacilly, with peppermint leaf water. Citrus scent.
• Cotton, powdery scent with notes of mallow.

A clarification here is important, because the formula has been improved: its efficacy comes from vegetal alcohol, which is the antibacterial agent, along with triethyl citrate, which hinders the work of bacterial enzymes. That is why they dry quickly, and that is why they sting if you have just shaved. And for that very same reason: they have anti-odor action, not anti-moisture. You will feel that you are sweating, and that is fine.

All four are vegan, without ingredients or derivatives of animal origin.

So, what should a deodorant be "free" of?

"Free-from" lists are often more marketing than science. What is really worth checking:

1. What irritates your skin. If you shave daily or have sensitive skin, alcohol might bother you: that is where the antiperspirant emulsion is gentler. If you are allergic to any component of the fragrance, look at it at the end of the ingredient list, where they are declared (limonene, linalool, geraniol, citronellol).
2. Propellant gas, if you care about the environmental impact. A roll-on does not need it.
3. Ingredients of animal origin, if you are vegan.
4. Impossible promises. An aluminum-free deodorant that promises "zero sweat" is lying to you: without aluminum salts, perspiration is not stopped.

And for transparency: in the ingredient lists of our four roll-ons, you will not find parabens, triclosan, or talc.

They are unisex

Sweat glands have no gender, and neither do bacteria. Our four roll-ons are not made "for her" or "for him": what changes is the scent. Choose by scent and by function.

Which one is for you

• You sweat a lot, or moisture on clothes makes you uncomfortable → 48H Antiperspirant (Algae or Chamomile).
• You sweat little, or prefer a formula of 98% natural origin and aluminum-free → 24H Deodorant (Mint or Cotton).
• It depends on the day → one of each. Antiperspirant for a long meeting or the gym; deodorant for a quiet day.

#WeTellYouEverything

Sources

1. Yves Rocher France, Act Beautiful. Des sels d'aluminium dans nos déodorants ?
2. National Cancer Institute. Antiperspirants/Deodorants and Breast Cancer (reviewed Aug 9, 2016).
3. American Cancer Society. Antiperspirants and Breast Cancer Risk (reviewed Jun 26, 2026).
4. Scientific Committee on Consumer Safety (EU). Opinion on the safety of aluminium in cosmetic products – Submission II, SCCS/1613/19 (adopted Mar 3-4, 2020).
5. Alzheimer's Drug Discovery Foundation. Is There a Link Between Aluminum and Alzheimer's? (Mar 12, 2018).
6. The molecular basis of thioalcohol production in human body odour. Scientific Reports, 2020.
7. Ingredient lists (INCI) for the four references, yves-rocher.fr.

This article is informative and does not replace medical advice.