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Scientists map where metallic taste hits the tongue

NCT ID NCT05227157

Knowledge-focused Sponsor: Centre Hospitalier de Valence Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tested how healthy volunteers perceive metallic taste on different parts of the tongue. Researchers applied an iron sulfate solution to four tongue areas and asked participants to rate the intensity. The goal is to better understand metallic taste, which could help diagnose taste disorders in the future.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
iron sulfate solution
What this could lead to
If successful, this could improve how doctors assess and diagnose metallic taste disorders in patients.
What could go wrong
This is a small, early-stage observational study in healthy people, so findings may not apply to patients with taste problems.

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.

Participants

60 people

The number who actually took part.

Started

Dec 2021

Finished

May 2022

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

healthy volonteers without olfactory and gustatory disorder

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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 ≥ 18 years old * Healthy volunteers * Read, write and understand the French language * Patient affiliated to a social security system * Written and signed informed consent Exclusion Criteria: * head and Neck cancer history * olfactory and gustatory disorder * Refusal to participate in research * Patient under guardianship, deprived of liberty, safeguard of justice

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Conditions

The condition(s) this trial relates to.

Glossopharyngeal Nerve Diseases glossopharyngeal nerve disorder Sensation Disorders Taste Disorders

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Sensation disorders Taste disorder, glossopharyngeal nerve Taste disorders Taste, metallic

Contacts and locations

Locations

  • Ch Valence

    Valence, Drome, 26953, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.