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Could a simple blood test and iron boost your Toddler's brain power?

NCT ID NCT01481766

Knowledge-focused Sponsor: The Hospital for Sick Children 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether finding and treating low iron (without anemia) in children aged 1 to 3 years can improve their early learning skills like language and motor abilities. About 127 children had a blood test, and those with low iron were given either iron liquid or a placebo for 4 months, plus diet advice. Researchers measured their thinking and learning before and after treatment to see if screening and treatment make a difference.

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.

Participants

127 people

The number who actually took part.

Started

Jun 2012

Finished

Dec 2018

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

12 to 40 months

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 between 12 and 40 months attending any well child visit * Informed parental consent Exclusion Criteria: * developmental disorder * genetic, chromosomal or syndromic condition * chronic medical condition (with the exception of asthma and allergies) * chronic anemia, iron deficiency, or recent oral iron supplementation or treatment * prematurity, with a gestational age of less than 35 weeks * low birth weight less than 2,500 g; * attending the office for an acute illness, such as a viral illness, or other health concern other than for a well-child assessment * any contraindications to receiving elemental iron * the use of any natural health product containing the same medicinal ingredient(s) as the investigational product * English is not spoken to the child in the home or in a child care setting * CRP level ≥10 mg/L

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Conditions

The condition(s) this trial relates to.

Iron Deficiencies

As listed by the trial registrant

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

Non-anemic iron deficiency

Contacts and locations

Locations

  • St. Michael's Hospital

    Toronto, Ontario, M5B 1W8, Canada

  • The Hospital for Sick Children

    Toronto, Ontario, M5G 1X8, Canada

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