Conditions: Vitamin D Supplementation
Keywords: vitamin D
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 56
Healthy volunteers: yes

Brief summary:
This double blind, randomized controlled trial compares two supplemental doses of vitamin D in health adolescents.

Detailed description:
Vitamin D deficiency is a common problem. Currently, data do not support a recommended vitamin D supplementation dose for health adolescents to maintain normal vitamin D levels. This double blind, randomized controlled 12 week trial compares the use of two supplemental doses of vitamin D in this population.

Arms:
arm 1: Subjects are randomized to take 200 IU vitamin D3 daily in this arm. arm 2: Subjects are randomized to take 1000 IU vitamin D3 daily in this arm.

Interventions: intervention 1: Supplemental Vitamin D
Intervention descriptions: intervention 1: Subjects were randomized to either take 200 IU of vitamin D or 1000 IU of vitamin D daily for 11 weeks and labs were compared before and after.

Protocol document: