Daily and Weekly Iron Supplementation in Infants

May 28, 2026 updated by: Mahidol University

Efficacy of Daily and Weekly Iron Supplementation on Anemia Prevalence in Thai Infants Aged 6-12 Months

This study aims to compare the efficacy of daily iron supplementation and weekly iron supplementation in infants aged 6-12 months on the prevalence of anemia, hemoglobin level, and serum ferritin levels. Infants will be enrolled at 6 months and will be randomly assigned to receive either daily or weekly iron supplementation for the first 3 months and will be followed by weekly iron supplementation for another 3 months.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This study aims to compare the efficacy of daily iron supplementation and weekly iron supplementation in infants aged 6-12 months on the prevalence of anemia, hemoglobin level, and serum ferritin levels. Normal birth weight and term infants will be enrolled at 6 months based on the inclusion criteria. Eligible participants will be assessed at baseline, including anthropometry, dietary intake, and biochemistry (hemoglobin, iron status, vitamin A status, and inflammation). Participants will then be randomly assigned to receive either daily or weekly iron supplementation for the first 3 months. Participants will be followed up at 9 months for the same assessments and will receive weekly iron supplementation for another 3 months. Participants will be followed up at 12 months and the same assessments will be performed. After that, participants will go back to the routine health care service, weekly iron supplementation.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
287

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Thailand
    • Changwat Nakhon Pathom
      • Sam Phran, Changwat Nakhon Pathom, Thailand, 73110
        • Samphran District Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Apparently healthy infant, aged 6 months ± 2 weeks
  • Having a birth weight between 2,500 and 4,000 grams
  • Being born full term (37 to 41 weeks of age + 6 days)
  • Having hemoglobin ≥ 10.5 g/dL
  • Being planned to breastfeed with complementary food and/or complementary foods with formula milk

Exclusion Criteria:

  • Infants with chronic illnesses or thalassemia clinical signs such as anemia, enlarged liver, or spleen (if parental history suggests the child is at risk of developing a thalassemia disease that may not show clinical symptoms)
  • Previously or currently taking an iron supplement

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Group 1 daily iron supplementation

12.5 mg daily iron syrup supplementation from 6-9 months old, followed by 12.5 mg weekly iron syrup supplementation from 9-12 months old.

Infants aged 6-9 months will receive two iron syrup bottles. One bottle aims for ingestion every Monday of the week, and one bottle aims for ingestion on other days of the week.

At ages 9-12 months, infants will receive an iron syrup bottle that aims for ingestion every Monday of the week.
Dietary supplement: Iron supplement
Group 1: 12.5 mg daily iron syrup supplementation from 6-9 months old
Other: Group 2 weekly iron supplementation

12.5 mg weekly iron syrup supplementation from 6-12 months old. Infants aged 6-9 months will receive an iron syrup bottle that aims for ingestion every Monday of the week and a placebo bottle that aims for ingestion on other days of the week.

At ages 9-12 months, infants will receive an iron syrup bottle that aims for ingestion every Monday of the week.
Dietary supplement: Iron supplement
Group 1: 12.5 mg daily iron syrup supplementation from 6-9 months old

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Anemia status
Time Frame: at aged 6, 9, and 12 months
Hemoglobin concentration will be assessed and classified as anemia or non-anemia.
at aged 6, 9, and 12 months
Iron status
Time Frame: at aged 6, 9, and 12 months
Serum ferritin will be assessed to reflect iron status
at aged 6, 9, and 12 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Weight
Time Frame: at aged 6, 9, and 12 months
Body weight will be assessed, and weight-for-age and weight-for-length Z scores will be generated
at aged 6, 9, and 12 months
Length
Time Frame: at aged 6, 9, and 12 months
Length will be assessed, and length-for-age Z scores and weight-for-length will be generated
at aged 6, 9, and 12 months
Dietary intake
Time Frame: at aged 6, 9, and 12 months
Dietary intake will be assessed using the 24-hr dietary recall for 3 days
at aged 6, 9, and 12 months
Head circumference (HC)
Time Frame: at aged 6, 9, and 12 months
HC will be assessed, and head circumference-for-age Z scores will be generated
at aged 6, 9, and 12 months

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Hemoglobin typing
Time Frame: at aged 12 months
Hemoglobin typing will be assessed
at aged 12 months
C-reactive protein (CRP)
Time Frame: at aged 6, 9, and 12 months
High sensitivity CRP will be analyzed and will be used for the adjustment of serum ferritin
at aged 6, 9, and 12 months
Alpha-1 acid glycoprotein (AGP)
Time Frame: at aged 6, 9, and 12 months
AGP will be analyzed and will be used for the adjustment of serum ferritin
at aged 6, 9, and 12 months
Serum transferrin receptor
Time Frame: at aged 6, 9, and 12 months
Serum transferrin receptor will be assessed to reflect iron status
at aged 6, 9, and 12 months
Serum Retinol Binding Protein (RBP)
Time Frame: at aged 6, 9, and 12 months
RBP will be assessed to reflect vitamin A status
at aged 6, 9, and 12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Mahidol University

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Suranaree University of Technology

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Tippawan Pongcharoen, PhD, Mahidol University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 15, 2023

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 25, 2024

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 14, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 13, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 13, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 19, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 1, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 28, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • MU-CIRB 2022/313.1411

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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