Effect of Vitamin D Supplementation on Endothelial Function in Obese Adolescents



Status:Completed
Conditions:Obesity Weight Loss, Other Indications, Cardiology, Gastrointestinal
Therapuetic Areas:Cardiology / Vascular Diseases, Endocrinology, Gastroenterology, Other
Healthy:No
Age Range:12 - 18
Updated:5/5/2014
Start Date:November 2012
End Date:December 2014
Contact:Asma Javed, MBBS
Email:javed.asma@mayo.edu
Phone:507-284-3300

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Vitamin D deficiency has been linked to endothelial dysfunction in adults. Obese adolescents
have a high prevalence of Vitamin D deficiency as well as evidence of endothelial
dysfunction. Our hypothesis is that supplementation of Vitamin D deficient adolescents with
Vitamin D would lead to improvement in endothelial dysfunction.


Inclusion Criteria:

1. Age 12-18 years

2. BMI >95% for age and gender

3. 25 (OH) D levels less than 30 ng/ml

Exclusion Criteria:

1. 25 (OH) D levels >30 ng/mL

2. Serum calcium >10.4 mg/dL

3. Serum phosphorus > 4.7 mg/dl

4. Pregnancy or nursing

5. Current cancer

6. Patients on vitamin D3 supplementation exceeding 400 IU/day

7. Hypertension defined as Blood Pressure over the 95th percentile for age, gender and
height

8. Dietary calcium intake exceeding 1500 mg/day,

9. Hepatic or renal disorders

10. Type 1 or type 2 diabetes mellitus

11. Subjects receiving insulin, metformin, or oral hypoglycemic medications

12. Subjects with malabsorption disorders (celiac disease, cystic fibrosis,inflammatory
bowel disease)
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200 First Street SW
Rochester, Minnesota 55905
507-284-2511
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