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Could vitamin d deficiency trigger dizzy spells? new study investigates

NCT ID NCT07491965

Knowledge-focused Sponsor: Sohag University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Updated 1 time

Summary

This study is looking at whether people with a common inner-ear condition called benign paroxysmal positional vertigo (BPPV) have lower vitamin D levels than those without it. Researchers will compare vitamin D in 160 adults — half with BPPV and half without. The goal is to see if there is a connection, which could help guide future care.

What this could mean

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

What this could lead to
If a link is found, it could suggest that checking or correcting vitamin D levels might help manage BPPV in some people.
What could go wrong
This is an observational study, not a treatment trial. It cannot prove cause and effect, and results may not apply to everyone with BPPV.

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

About 160 people

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

Started

Apr 2026

Expected to finish

Oct 2026

An estimate. End dates often move.

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

Otolaryngology (ENT) Outpatient Clinic and Audiovestibular unit at Sohag University Hospital, Sohag, Egypt.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

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: * • Cases: Adults with a confirmed diagnosis of idiopathic BPPV based on positive Dix-Hallpike maneuver (nystagmus and vertigo lasting \<1 minute). * Controls: Adults attending ENT clinic without history of vertigo or BPPV, confirmed by negative Dix-Hallpike test. Exclusion Criteria: * Known causes of secondary vertigo (e.g., Meniere's disease, vestibular neuritis, central vertigo). * Conditions affecting vitamin D metabolism (e.g., chronic kidney disease, malabsorption syndromes, hyperparathyroidism). * Use of medications interfering with vitamin D levels (e.g., anticonvulsants, glucocorticoids) in the past 3 months. * Pregnancy or lactation. * Inability to provide consent.

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Conditions

The condition(s) this trial relates to.

benign paroxysmal positional vertigo vitamin D deficiency

As listed by the trial registrant

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

Benign paroxysmal positional vertigo (BPPV)

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

  • Sohag University Hospital

    RECRUITING

    Sohag, Egypt

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