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Vitamin c study for care home residents pulled before it began

NCT ID NCT05122481

Knowledge-focused Sponsor: University of Aberdeen 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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study aimed to find the right daily dose of vitamin C for older people living in care homes, who often have low levels of this immune-supporting nutrient. The goal was to gather data for a future trial on whether vitamin C could help reduce the risk and severity of respiratory infections like COVID-19. However, the study was withdrawn before enrolling any participants, so no results are available.

What this could mean

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

Active substance
Vitamin C (ascorbic acid) dietary supplement
What this could lead to
If successful, this study would help design a larger trial testing whether optimal vitamin C can reduce the risk and severity of respiratory infections in vulnerable older adults.
What could go wrong
This was only a small pilot study and was withdrawn before any participants were enrolled, so no results are available. It is too early to know if vitamin C supplementation will have any meaningful benefit.

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

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.

Expected to start

Jan 2023

An estimate. Start dates often move.

Expected to finish

Jul 2023

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.

Ages

65 to 100 years

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: 1. Resident in a care home 2. Aged ≥65 years Exclusion Criteria: 1. Unable to give fully informed consent, e.g. due to severe dementia 2. Any health conditions precluding collection of fresh urine samples (e.g. urinary catheter) 3. Active (acute) respiratory infection 4. Currently taking vitamin C containing supplements at greater than the recommended dietary intake (40 mg/d)

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Conditions

The condition(s) this trial relates to.

vitamin deficiency disorder

As listed by the trial registrant

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

Hypovitaminosis Vitamin C abnormal

Contacts and locations

Locations

  • University of Aberdeen

    Aberdeen, Aberdeen City, AB25 2ZD, United Kingdom

More trials for these conditions

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