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Can a Blood-Derived gel help you smell again?

NCT ID NCT07151703

Disease control Sponsor: Taipei Veterans General Hospital, Taiwan 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether a person's own platelet-rich plasma (PRP) can improve smell when placed in the nose on a gel sponge versus being injected. Sixty adults with smell loss lasting over three months will receive one treatment and then do smell training for three months. Researchers will compare smell test scores and comfort between the two methods.

What this could mean

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

Active substance
autologous platelet-rich plasma (PRP)
What this could lead to
If it works, this could offer a simple, office-based treatment to help restore smell in people with persistent loss of smell.
What could go wrong
This is a small, early-phase trial with only 60 participants. PRP is not a proven treatment for smell loss, and the benefit may be modest or no better than current care.

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

Phase 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

About 60 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Oct 2025

An estimate. Start dates often move.

Expected to finish

Dec 2028

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

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

Ages

18 to 80 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Aged between 18 and 80 years, regardless of sex * Subjective complaint of olfactory dysfunction with confirmed hyposmia or anosmia based on standardized olfactory testing * History of at least 3 months of prior olfactory training but with persistent olfactory complaints Exclusion Criteria: * Congenital anosmia * Diagnosed neurological or structural brain abnormalities (e.g., brain tumor, major head trauma, stroke) with low likelihood of olfactory recovery * Inability or unwillingness to comply with study procedures or follow-up assessments

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Conditions

The condition(s) this trial relates to.

anosmia

As listed by the trial registrant

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

Anosmia Hyposmia Olfactory dysfunction

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Taipei Veterans General Hospital

    Taipei, 112201, Taiwan

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