Study of Breastmilk With Vitamin D-Sulfates


About this study

The purpose of this study is to measure vitamin D sulfates in freshly expressed breastmilk samples and identify correlations with serum vitamin D status.

Knowledge obtained from these measurements could suggest alternative approaches to improving vitamin D intake for infants.        

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • Lactating women.
  • ≥ 2 weeks after delivery.
  • No intentions of weaning during the study.

Exclusion Criteria: 

  • History of sarcoidosis.
  • History of renal disease.
  • Premature birth.
  • Taking daily supplement with ≥ 600 IU vitamin D in the past 30 days (accounting for washout period).

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Thomas Thacher, M.D.

Open for enrollment

Contact information:

Renee Weatherly

(507) 266-4680

More information


Publications are currently not available

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