Effects of whole vs. nonfat milk on children's body composition

Effects of Whole vs. Nonfat Milk Consumption on Body Composition in Children: a 1-Year RCT

Not applicable Interventional Boston Children's Hospital · NCT05464186

This study is testing whether kids aged 9 to 12 who drink whole milk instead of nonfat milk gain less weight and eat healthier foods.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment200 (estimated)
Ages9 Years to 12 Years
SexAll
SponsorBoston Children's Hospital Academic / other
Locations1 site (Boston, Massachusetts)
Trial IDNCT05464186 on ClinicalTrials.gov

What this trial studies

This study evaluates how consuming whole milk compared to nonfat milk affects body composition, cardiometabolic disease risk factors, and dietary quality in children aged 9 to 12 years with a BMI at or above the 75th percentile. The research aims to determine if whole milk consumption leads to less weight gain and improved dietary quality by reducing the intake of lower quality foods. Participants will be recruited from the Greater Boston area and will consume either whole or nonfat milk as part of their diet during the study period.

Who should consider this trial

Good fit: Ideal candidates are children aged 9 to 12 years with a BMI at or above the 75th percentile living in the Greater Boston area.

Not a fit: Patients with major medical illnesses, eating disorders, or milk allergies may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide insights into dietary recommendations that help reduce obesity and related health risks in children.

How similar studies have performed: Previous observational studies have suggested that whole milk may be associated with less weight gain and lower cardiometabolic disease risk, indicating potential success for this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Aged 9 to 12 years
* BMI ≥75th percentile for sex and age
* Residence in the Greater Boston catchment area

Exclusion Criteria:

* Aversion to nonfat or whole milk
* Physician diagnosis of major medical illness, eating disorder, or milk allergy (lactose intolerance not exclusionary as lactase treated milk can be provided)
* Plans to move away from the Greater Boston catchment area during the study period
* Plans to be away from home for ≥5 weeks during the study period (e.g., extended summer vacation)
* Change in body weight exceeding 10% during prior year
* Recent adherence to a special diet
* Chronic use of any medication or dietary supplement that could affect study outcomes
* Another member of the family (first degree relative) or household participating in the study

Where this trial is running

Boston, Massachusetts

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 ObesityDiabetesCardiovascular Diseases
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.