D3VH Study – Vitamin D and Vascular Health

Vitamin D3 and Vascular Health in Obese Children

Protocol Description

The National Institutes of Health-funded D3VH research study will help researchers understand whether increasing the vitamin D levels of vitamin D-deficient children with obesity can improve their heart-health. Obese and overweight children have a higher chance of having cardiovascular disease risk factors and vitamin D deficiency, which itself is a cardiovascular risk factor. Childhood heart-health risk factors can track into adulthood. Potentially, improvement of cardiovascular health of obese and overweight children through vitamin D supplementation may reduce their risk of heart disease later in life.

Eligibility Criteria

Subject to certain exclusion criteria, the D3VH study is enrolling healthy 10- to 18-year-old obese and overweight children (body mass index in 85th percentile or higher), who are found to be vitamin D-deficient in the screening evaluation.
Boys and Girls: Ages 10 to 18


Eligible participants will have 3 study visits over 6 months at the Clinical and Translational Research Center at the Montefiore Hospital of UPMC in Oakland. Enrolled children will be randomly assigned to take one of 3 dose levels of vitamin D3 in tablet form (600 IU or 1000 IU or 2000 IU) once a day for 6 months. Study procedures will include vascular function testing, body composition assessment, blood tests, and questionnaires.
Visits: 3
Duration: 6 months

Status: Closed to Enrollment

Source(s) of Support

National Heart, Lung, and Blood Institute (NHLBI)

Primary Investigator

Kumaravel Rajakumar, MD, MS

Contact Information

For more information about the study or enrollment, please contact:
Dr. Rajakumar
or Study Coordinator Flora Olabopo, BS