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Could vitamin d levels influence asthma control?

NCT ID NCT07733635

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

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 29, 2026 · Last updated Jul 30, 2026 · Updated 1 time

Summary

This study examines whether vitamin D levels are linked to asthma control, lung function, and oxidative stress in Egyptian adults with bronchial asthma. Researchers will measure vitamin D in the blood, assess asthma symptoms with a standard test, and check lung function and markers of oxidative stress. No treatment is given; the goal is to better understand possible connections.

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 strong links are found, it could point toward vitamin D as a target for improving asthma management.
What could go wrong
This is an observational study, so it cannot prove cause and effect. Results may not apply to other populations.

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 134 people

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

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Feb 2027

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

The study population will consist of 200 adult patients with confirmed bronchial asthma recruited from Abbassia Chest Hospital, Cairo, Egypt. Eligible participants will be adults aged ≥18 years with stable asthma at the time of assessment. Participants will be categorized according to serum 25-hydroxyvitamin D \[25(OH)D\] concentrations into vitamin D deficient (\<20 ng/mL), vitamin D insufficient (20-30 ng/mL), and vitamin D sufficient (\>30 ng/mL) groups. Clinical characteristics, asthma control, pulmonary function, serum vitamin D status, and erythrocyte oxidative stress biomarkers will be assessed during a single study visit.

Ages

18 years and older

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 * Age ≥ 18 years. * Confirmed diagnosis of bronchial asthma. * Clinically stable at the time of assessment. * Availability of spirometry results. * Availability of laboratory investigations including serum 25(OH)D and oxidative stress biomarkers. Exclusion Criteria * Other chronic pulmonary diseases. * Active respiratory infection. * Malignancy. * Significant renal or hepatic disease. * Pregnancy. * Current vitamin D supplementation. * Other conditions known to markedly influence oxidative stress status.

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Conditions

The condition(s) this trial relates to.

asthma vitamin D deficiency

As listed by the trial registrant

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

Antioxidant Asthma Bronchial asthma Oxidative stress Pulmonary function impairment Vitamin D deficiency

How to take part

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  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

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