Efficacy Comparison of Weekly versus Daily Vitamin D Supplement in Healthy Infants

Status

Recruiting

Phases

Phase 4

Study type

Interventional

Source

TCTR

Registry ID

TCTR20250204006

Enrollment

168

Registered

2025-02-04

Start date

2024-07-23

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Vitamin D status in healthy infants receiving weekly versus daily vitamin D Supplement Vitamin D, vitamin D supplement, weekly

Interventions

The participants will receive oral weekly 2800-IU vitamin D for 9 months.,The participants will receive oral daily 400-IU vitamin D for 9 months.

Active Comparator Drug,Active Comparator Drug

Weekly vitamin D,Daily vitamin D

Eligibility

Sex/Gender

All

Age

1 Days to 12 Months

Inclusion criteria

Inclusion criteria: 1. Infants born in Chakri Naruebodindra Medical Institute 2. Infants whose mothers will have follow-up visits at Chakri Naruebodindra Medical Institute

Exclusion criteria

Exclusion criteria: 1. Infants whose parents refuse to participate in the study 2, Infants with absorption problem, fat absorption abnormality, or diseases/condition requiring other vitamin D supplement.

Design outcomes

Primary

Measure	Time frame
Serum 25-hydroxyvitamin D At 9 months after the intervention ng/mL	—

Secondary

Measure	Time frame
Safety of infants At 9 months after the intervention Incidence of elevated 25-OHD level	—

Countries

Thailand

Contacts

Public ContactPiyakarn Kasikigskulpol

Mahidol University

piyakan.ksi@gmail.com0870305022

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 10, 2026