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Can a Yeast-Based spray beat underarm odor? a trial puts it to the test
NCT ID NCT07726238
First seen Jul 24, 2026 · Last updated Aug 06, 2026 · Updated 3 times
Summary
This trial tests whether NOBO, a deodorant spray made from a yeast fermentation product (a postbiotic), can reduce underarm odor in healthy adults aged 18 to 70. Each participant applies NOBO to one armpit and a placebo to the other, then rates the odor themselves. The goal is to see if the postbiotic side smells less than the placebo side.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- a yeast-based postbiotic spray called NOBO
- What this could lead to
- If it works, this could offer a natural alternative to conventional deodorants for controlling body odor.
- What could go wrong
- This is a very small, early proof-of-concept trial with only 14 participants, so results may not apply broadly. The effect may be no better than placebo.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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16 people
The number who actually took part.
- Started
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Jul 2026
- Finished
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Jul 2026
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 70 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age: The subject is an adult between 18 and 70 y.o. * Skin health: The subject has no active skin conditions or lesions in the axillary region and no existing skin conditions (e.g., eczema, psoriasis, contact dermatitis). * Skin allergies: The subject has no known allergies to skin treatment products or cosmetics, toiletries, and/or topical drugs. Exclusion Criteria: * Subject is pregnant, nursing, or planning to become pregnant in the next 6 months. * Subject is an insulin-dependent diabetic. * Subject has been diagnosed or treated for cancer in the past 5 years. * Subject is currently using or has not used in the past two weeks any systemic antibiotics. * Subject is currently using or used within the last month any topical medications, over-the-counter (OTC) or prescription products on the underarms. * Subject is currently taking or plans to take during the study any anti-inflammatory for a chronic condition (except 81 mg-Aspirin per day), immunosuppressant, antihistamine, or sedative medications (i.e. containing antihistamines like Tylenol PM, Nyquil, etc.). * Subject is currently participating in another underarm clinical trial. Subjects may participate in other studies as long as the same test sites are not used or are testing similar products.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Kingdom
Brooklyn, New York, 11205, United States
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Other studies related to the condition(s) this trial covers.