Vitamin D Status and Supplementation in Athletes

Phase 3

Completed

• Conditions: Vitamin D Deficiency
• Interventions: Dietary Supplement: vitamin D

• Registration Number: NCT02008201
• Lead Sponsor: Wageningen University

Brief Summary

The objectives of this study are 1) to assess the prevalence of vitamin D deficiency in a group of sub elite athletes and 2) to identify seasonal changes in vitamin D status and the effect that supplementation may have during the course of a year.

The study is a double blinded parallel study design.

Detailed Description

Study population: 175 elite/ sub elite athletes, male and female, aged 18-60y, from a variety of sport disciplines

Study Timeline

• Study Start: 2012-05
• Study First Submitted: 2013-09-10
• Status Verified: 2013-12
• Study First Submitted QC: 2013-12-05
• Study First Posted: 2013-12-11
• Primary Completion: 2014-04
• Study Completion: 2014-04
• Last Update Submitted: 2014-12-12
• Last Update Posted: 2014-12-15

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 153

Inclusion Criteria

• athletes
• 19-60y

Exclusion Criteria

• subjects who take vitamin D supplements

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Vitamin D dose 1	vitamin D	Vitamin D dose 1
Vitamin D dose 2	vitamin D	Vitamin D dose 2
Vitamin D dose 3	vitamin D	Vitamin D dose 3

Primary Outcome Measures

Name	Time	Method
Change in serum 25(OH)D	Every 3 months during one year

Trial Locations

Locations (1)

Wageningen University; 🇳🇱 Wageningen, Netherlands