Body odour isn't about hygiene. It's about bacteria.

Probiotic Deodorant Spray — Probiotic SprayClinical strength, for the strongest body odour

Probiotic Deodorant Stick — Probiotic StickDaily use, for milder body odour

“After about 2 weeks of use, I have forgotten completely about the bad armpit smell!”

Tetyana, after two weeks with the spray.
Results differ from person to person.

A deodorant that works with your bacteria, not against them. Developed by Dr Chris Callewaert, known as Dr Armpit.

Shop the deodorants How it works ↓

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“After about 2 weeks of use, I have forgotten completely about the bad armpit smell!”

Tetyana, after two weeks with the spray. Results differ from person to person.

Fresh sweat hardly smells. Bacteria make the smell.

Certain skin bacteria break sweat down into odour.
Which bacteria live on you determines how you smell.
They also live deeper in the skin, around the hair roots. That's the mother nest of odour, and why washing only helps for a while.

Instead of fighting bacteria, we add the good ones.

Good bacteria
Odour-causing bacteria
Simplified illustration

Apply
One application per underarm on clean, dry skin. No need to disinfect first.
Good bacteria compete
The probiotics multiply on your skin and compete with the bacteria that cause odour.
Your microbiome shifts
The goal is a lasting shift, not a few hours of cover-up.

Registered trial

Does a spray with good bacteria improve underarm odour?

Design: Randomised and placebo-controlled, 67 participants, Ghent University. The participants, care providers and odour panel did not know which spray was used.
Result: Odour-causing bacteria such as Corynebacterium decreased, and so did the molecules related to musty, faecal and sour notes, such as naphthalene and indole.
Source: ClinicalTrials.gov, NCT03967470

What the trial found

Less odour, even after stopping.

In the trial, underarm odour improved and became less intense with the probiotic spray. Odour panel assessments and GC-MS results still showed the improvement after people stopped using it.

See all the evidence

I'm Chris. People call me Dr Armpit.

I study the bacteria that live on our skin, and I did that research at Ghent University and UC San Diego. Many people reached out to me after trying everything. Phiome is my answer: a way to change the microbiome, not hide the smell.

15 years of research into body odour
More than 40 scientific publications, books and book chapters
Featured in more than 1,000 media publications

Watch my TEDx talk ↗Google Scholar ↗DrArmpit.com ↗

As featured in

Give it a few weeks. You'll know what to expect.

Real moments from customers. Everyone is different: these are individual experiences.

Application & process

What others noticed

Day 1
Apply once per armpit on clean, dry skin. You'll keep sweating: it contains no aluminium salts that block your sweat glands. It targets odour, not moisture.
ChrisMore is not better. The bacteria multiply on their own.
“For the first time in living memory, I have woken up smelling good!”
Christine, the next morning
First days
Your smell can change for a while as the new bacteria settle in.
ChrisA light biscuit smell is normal. It comes from the yeast extract we grow the bacteria in.
“I've been using the Probiotic Deodorant Stick for a few days and I'm very pleased with it.”
Willeke, after a few days
A few weeks in
Your microbiome needs time to adjust. Bacteria also live deeper in the skin, around the hair roots.
ChrisDon't go back to your regular deodorant in between. It kills the good bacteria too.
“I was someone whose odour didn't smell nice. A lot of shame and constant insecurity. But after a few weeks of the deodorant, I really smell very different.”
Marjon, after a few weeks
Months later
With continued use, the result builds up. Over time, you may need to apply it less often.
ChrisWhen your spray runs out, use nothing for a while. The best effect often shows afterwards.
“I've been using it for almost 6 months […] It actually surprises me that this hasn't become even bigger and better known by now.”
Dana, after almost six months

Which one sounds like you?

I've tried everything against strong body odour.
Clinical strength
Probiotic Spray
Our strongest formula, with the highest concentration of live probiotics. From the first spray, it starts shifting your microbiome in the right direction. It tackles body odour at the root cause. For strong body odour, or odour that hasn't responded to other products. Also works on washed and dried clothes that keep smelling.
€45
Order the spray
I want a gentle deodorant for every day.
Daily use
Probiotic Stick
A lower concentration of probiotics, with added prebiotics that help the good bacteria thrive, and small molecules that calm the sweat glands. It tackles body odour at the root cause, in several ways. For everyday use and milder body odour.
€39
Pre-order the stick
My shirts end up smelling, even after washing.
For your clothes
Probiotic T-shirt
Organic cotton with encapsulated probiotics that are released gradually, wear after wear.
XS S M L XL
Order the T-shirt