NCT01208636

Environmental & Genetic Influences on Vitamin D Status

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 40 (actual)
• Sponsor: Creighton University · Academic / Other
• Sex: All
• Age: 18 Years – 60 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to determine the effect of environmental and genetic influences on Vitamin D status.

Detailed description

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. Surprisingly, Vitamin D deficiency has been described in people dwelling in southern Florida and in surfers in Hawaii. We hypothesize that genetic variations in vitamin metabolism accounts for these differences.

Conditions

• Vitamin D Deficiency

Timeline

• Start date: 2010-08-01
• Primary completion: 2010-08-01
• Completion: 2010-08-01
• First posted: 2010-09-24
• Last updated: 2010-09-24

Locations

1 site across 1 country: United States