MedTrace Logo

Environmental Influences on Vitamin D Status

NCT00780247 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 50

Last updated 2008-10-27

No results posted yet for this study

Summary

Vitamin D deficiency is a common problem. The principal source of vitamin D for humans is solar exposure, with cutaneous synthesis of vitamin D by photoconversion of 7-dehydrocholesterol in the skin to pre-vitamin D3. Latitude, altitude, season, skin pigmentation, and age are recognized factors that influence how much vitamin D can be made by solar exposure. However, the relative influences of each are largely unknown and we cannot reliably answer the question of how much sun exposure an individual needs at various latitudes and at various seasons in order to ensure normal vitamin D status.

Conditions

  • Vitamin D Deficiency

Sponsors & Collaborators

  • Procter and Gamble

    collaborator INDUSTRY

  • Creighton University

    lead OTHER

Principal Investigators

  • Laura A Armas, MD · Creighton University

Eligibility

Min Age
18 Years
Max Age
60 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2008-07-31
Primary Completion
2008-08-31
Completion
2008-08-31

Countries

  • United States

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00780247 on ClinicalTrials.gov