Antiperspirant vs. Deodorant: Differences and Complete Guide
Antiperspirant vs. Deodorant: What's the Difference?
An antiperspirant blocks perspiration. A deodorant neutralizes odors. The difference is fundamental, yet most people use these two terms as if they were interchangeable. If you're wondering which one to choose for your armpits, you've come to the right place.
Perspiration is a natural and vital mechanism: it regulates your body temperature. Every day, your body produces between 0.5 and 1 liter of sweat, some of which comes from your armpits. The problem isn't the sweat itself—it's almost odorless. It's the bacteria on your skin that, by breaking down the sweat, create unpleasant odors.
This is where the choice between antiperspirant and deodorant becomes crucial. One acts on the cause (sweat), the other on the consequence (odor). In this guide, we'll explain everything: how they work, what ingredients to look out for, and why more and more people in Switzerland and Europe are turning to natural alternatives.
How does an antiperspirant work?
An antiperspirant reduces the amount of sweat produced by your sweat glands. Its main active ingredient is an aluminum salt—the most common being aluminum chlorohydrate. Here's how it works in practice.
When you apply an antiperspirant, the aluminum salts dissolve in the thin layer of sweat present on your skin. They then form a temporary gel that partially obstructs the ducts of the sweat glands. The result: less sweat reaches the surface of your skin. The effect is temporary—it lasts between 12 and 24 hours depending on the formula.
According to a study published in the Journal of Cosmetic Dermatology (2020), antiperspirants containing between 15% and 25% aluminum salts reduce perspiration by an average of 20% to 50%. "Clinical strength" versions sometimes go up to 30% concentration.
Typical ingredients in an antiperspirant
| Ingredient | Role | Present in a natural deodorant? |
|---|---|---|
| Aluminum chlorohydrate | Blocks sweat glands | No |
| Aluminum zirconium | Reinforced antiperspirant | No |
| Cyclopentasiloxane | Silicone texturizing agent | No |
| Propylene glycol | Humectant, aids penetration | Rarely |
| Synthetic fragrance | Masks odors | No (essential oils preferred) |
What to remember: an antiperspirant is classified as a regulated cosmetic product in Switzerland and the EU, because it modifies a bodily function (perspiration). This is what fundamentally distinguishes it from a deodorant.
How does a natural deodorant work?
A deodorant does not block perspiration. It acts on the bacteria responsible for odors and neutralizes malodorous compounds. This is a radically different approach: the body is allowed to function normally, while the result is managed.
Natural deodorants use plant-based or mineral ingredients to create an unfavorable environment for bacteria. Among the most common are: baking soda (beware of irritation), cornstarch or arrowroot (absorbs moisture), essential oils (antibacterial properties), zinc ricinoleate (neutralizes odors), and nourishing vegetable oils.
Deodorant vs. antiperspirant: a comparison
| Criterion | Antiperspirant | Natural Deodorant |
|---|---|---|
| Mechanism of action | Blocks sweat | Neutralizes odors |
| Aluminum salts | Yes (main ingredient) | No |
| Perspiration | Reduced by 20-50% | Normal (body sweats) |
| Anti-odor effectiveness | Good (less sweat = fewer odors) | Good to very good (depending on formula) |
| Adaptation period | None | 2 to 4 weeks possible |
| Impact on skin | Risk of irritation, clogged pores | Generally better tolerated |
| Stains on clothes | Frequent white or yellow stains | Rare with baking soda-free formulas |
| Respect for the microbiome | Possible disruption | Preserves natural balance |
An often overlooked point: yellow stains on white t-shirts do not come from sweat, but from the chemical reaction between aluminum salts and sweat proteins. By switching to an aluminum-free deodorant, this problem disappears. If you're looking for a deodorant that truly delivers on its promises, our complete guide to effective deodorants gives you all the criteria to make the right choice.
Aluminum in antiperspirants: should we be concerned?
The question comes up regularly: are aluminum salts in antiperspirants dangerous? The scientific answer, in 2026, remains nuanced.
The French National Agency for Food, Environmental and Occupational Health Safety (ANSES) published a report in 2020 recommending limiting aluminum concentration to 0.6% in cosmetics, well below the 15-25% present in classic antiperspirants. The EU's Scientific Committee on Consumer Safety (SCCS) re-evaluated aluminum in 2020 and concluded that the concentrations used in antiperspirants exceed the acceptable safety margin.
What studies show, in summary: dermal absorption of aluminum is low (approximately 0.01% of the applied dose), but it exists. Aluminum accumulates in the body, particularly in breast tissue. A direct link to pathologies has not been definitively proven, but the precautionary principle is widely adopted by the European scientific community.
In Switzerland, the FSVO (Federal Food Safety and Veterinary Office) reminds that the main source of aluminum exposure remains food, but recommends reducing avoidable sources of exposure—including cosmetics.
It is this precautionary approach that is pushing more and more consumers and brands to offer aluminum-free alternatives. According to a Statista market study (2025), the natural aluminum-free deodorant segment is growing by 12% per year in Europe, compared to 2% for classic antiperspirants.
The transition from antiperspirant to natural deodorant
Switching from an antiperspirant to a natural deodorant is a change your body needs to get used to. Here's what happens and how to manage the adjustment period.
Why an adjustment period?
When you've been using an antiperspirant for months or years, your sweat glands are used to being partially blocked. When you stop, they resume their normal activity—and may even temporarily overcompensate. At the same time, your armpit microbiome (the bacteria that live there) needs to rebalance.
This phase lasts an average of 2 to 4 weeks. During this period, you may sweat more and smell a little stronger than usual. This is normal and temporary.
Tips for a successful transition
- Start on a weekend or vacation, when social pressure is lower
- Cleanse your armpits thoroughly morning and evening with a mild soap
- Apply your deodorant to clean, dry skin—this is the key to effectiveness
- Reapply if necessary in the middle of the day during the first few weeks
- Wear natural materials (cotton, linen) that allow the skin to breathe
- Be patient—after the adjustment phase, most users notice fewer odors than with their old antiperspirant
An interesting fact: a study published in PeerJ (2016) showed that the use of antiperspirants significantly alters the composition of the axillary microbiome, favoring certain strong odor-producing bacteria (such as Actinobacteria). By stopping antiperspirant, the microbiome gradually returns to a more diverse state—and often associated with fewer odors.
The basic. approach: a natural deodorant without compromise
At basic., we made a clear choice from the start: no aluminum salts, no baking soda, no compromise on effectiveness. Our deodorant Le classik is formulated with only 8 ingredients—and not one more.
Why no baking soda? Because the pH of baking soda (around 8.5) is too far from that of the skin (between 4.5 and 5.5). The result: in many people, it causes irritation, redness, or even chemical micro-burns. This is not what we consider skin-friendly care.
Our formula is based on simple and effective ingredients: virgin coconut oil (natural antibacterial), beeswax (texture and protection), starch (moisture absorption) and carefully dosed essential oils. Each deodorant is handcrafted in our workshop in Lausanne.
The Le classik rechargeable format goes even further: a recycled aluminum applicator that you keep, refills that you replace. Less waste, same effectiveness. It's a simple gesture that is part of a more responsible routine, without sacrificing comfort. We explain everything about this format in our rechargeable deodorant guide.
And like all basic. products, our deodorants are PETA certified vegan—no animal testing, no animal-derived ingredients (except beeswax, from respectful Swiss beehives). Everything is transparent, from the INCI list to the manufacturing process.
FAQ: antiperspirant and natural deodorant
What is the difference between an antiperspirant and a deodorant?
An antiperspirant contains aluminum salts that partially block sweat glands to reduce perspiration. A deodorant neutralizes odor-causing bacteria without preventing sweat from flowing. Both protect against bad odors, but through different mechanisms.
Is a natural deodorant as effective as an antiperspirant?
Yes, a well-formulated natural deodorant effectively protects against odors for 12 to 24 hours. The difference: you continue to sweat normally, which is healthy for your body. Most users notice no difference in odor after the initial adaptation period of 2 to 4 weeks.
Are aluminum salts in antiperspirants dangerous?
The scientific debate is ongoing. ANSES and the European SCCS have warned about exceeding safety margins with current concentrations. No direct causal link has been proven with pathologies, but the precautionary principle leads many consumers and health professionals to recommend aluminum-free alternatives.
How long does the transition to a natural deodorant last?
The adaptation period lasts an average of 2 to 4 weeks. During this phase, your sweat glands resume their normal activity and your axillary microbiome rebalances. You may sweat a little more and smell more at first—this is temporary and perfectly normal.
Why do antiperspirants stain clothes?
Yellow stains on white clothes are caused by the chemical reaction between the aluminum salts in the antiperspirant and the proteins contained in sweat. By switching to an aluminum-free deodorant, this problem disappears completely.
Is a baking soda-free deodorant effective?
Absolutely. Baking soda is effective against odors but its high pH (8.5) irritates the skin of many people. Alternatives such as arrowroot starch, coconut oil, and zinc ricinoleate offer equivalent protection without the risk of irritation. This is the choice made by basic. for Le classik.
Can you use a natural deodorant during sports?
Yes. Apply your deodorant to clean, dry skin before exercise. For intense activities, reapplication after a post-sport shower is recommended. Natural deodorant does not block your body's thermoregulation—a real advantage during physical exercise.
What is the most ecological format for a deodorant?
The rechargeable format is currently the most sustainable: you keep the applicator (often made of recycled aluminum) and only replace the refill. This reduces packaging waste by more than 70% compared to disposable formats. Solid deodorants without plastic packaging are the second most ecological option.
Sources
Sources: ANSES — Aluminum and cosmetics | SCCS — Scientific Committee on Consumer Safety | PeerJ — The effect of habitual and experimental antiperspirant and deodorant product use on the armpit microbiome (2016) | FSVO Switzerland — Aluminum
Do you want to discover a natural deodorant without aluminum and baking soda, handcrafted in Lausanne? Discover the basic. deodorant range