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Breastmilk vitamin d study seeks to unlock infant nutrition secrets

NCT ID NCT06203041

Knowledge-focused Sponsor: Mayo Clinic 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 how much vitamin D sulfate is in breastmilk and whether it reaches infants. Researchers collected breastmilk samples from 101 lactating mothers before and after 28 days of vitamin D supplements, and also tested infant saliva and gut contents. The goal was to understand the nutritional value of vitamin D sulfates for exclusively breastfed babies.

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

101 people

The number who actually took part.

Started

Nov 2023

Finished

May 2026

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

1 month to 60 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.

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

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Conditions

The condition(s) this trial relates to.

Breast Milk Expression vitamin D deficiency

As listed by the trial registrant

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

Breast milk collection Vitamin D deficiency

Contacts and locations

Locations

  • Mayo Clinic Rochester

    Rochester, Minnesota, 55905, United States

More trials for these conditions

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