Measuring Vitamin D Sulfates in Breastmilk

Vitamin D Sulfates in Breastmilk

Not applicable Interventional Mayo Clinic · NCT06203041

This study is testing how taking vitamin D supplements affects the levels of vitamin D in breastmilk and how it impacts the health of breastfeeding mothers and their babies.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment60 (estimated)
Ages1 Month to 60 Years
SexAll
SponsorMayo Clinic Academic / other
Locations1 site (Rochester, Minnesota)
Trial IDNCT06203041 on ClinicalTrials.gov

What this trial studies

This study aims to assess the nutritional value of vitamin D sulfates in breastmilk by collecting samples from lactating mothers before and after a 28-day vitamin D supplementation period. Infants will also participate by providing saliva and stool samples to evaluate the vitamin D sulfate levels in their systems. The study involves two visits for mothers, where they will express breast milk and undergo blood draws, while infants will provide swabs from their mouths and diapers. The goal is to understand the impact of maternal vitamin D supplementation on breastmilk and infant health.

Who should consider this trial

Good fit: Ideal candidates include lactating mothers who are at least two weeks postpartum and exclusively breastfeeding their infants.

Not a fit: Patients who have a history of sarcoidosis, renal disease, or are taking high doses of vitamin D supplements may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance our understanding of vitamin D's role in infant nutrition and potentially improve guidelines for maternal supplementation.

How similar studies have performed: While there is ongoing research into vitamin D supplementation, this specific approach to measuring its impact in breastmilk and infant health is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Lactating Mothers

Inclusion Criteria:

* Lactating mothers
* ≥2 weeks after delivery
* No intentions of weaning during the study

Exclusion Criteria:

* History of sarcoidosis
* History of renal disease
* Premature birth- \<37 weeks
* Taking daily supplement with ≥600 IU vitamin D in the past 30 days

Breastfeeding Infants

Inclusion Criteria:

* Female and male infants
* Exclusively breastfed

Exclusion Criteria:

* No known gastrointestinal diseases that require medical treatment
* Currently prescribed antibiotics or have taken antibiotics \<2 weeks from collection

Where this trial is running

Rochester, Minnesota

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Vitamin D DeficiencyBreast Milk Collection
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.