Vitamin D Production Levels Achieved by Sunbed Tanning

Vitamin D Society87 enrolled

Overview

Health Canada's Radiation Emitting Devices (RED) Act provides exposure time guidelines for sunbed use. These guidelines are intended to protect sunbed users from overexposure to UV radiation. Overexposure is defined as "exposure that exceeds the amount needed for vitamin D production and could lead to skin or eye damage. Acute overexposure induces sunburn." However, the effect of the recommended time exposure schedule on serum 25(OH)D response has not been characterized. Further, it is unknown if the maximum time exposures are required to reach and/or maintain optimal 25(OH)D levels. The aim of the current study is to characterize serum 25(OH)D response to regular sunbed use following the time exposure schedule recommended by Health Canada.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Healthy

Interventions

Eligibility

Sex: ALLMin age: 18 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * 18 years and older, male or female Exclusion Criteria: * History of skin cancer, granulomatous disease, liver disease, or kidney disease * Photosensitive medications * Pregnancy * Vitamin D supplementation within last 60 days * Sunbed use within last 60 days * Planned travel to sunny destination during study period (January to April 2014)

Outcomes

Primary Outcomes

To characterize serum 25(OH)D response to regular sunbed use, when performed according to the RED Act exposure time guidelines

Time frame: 12 weeks

Secondary Outcomes

To characterize serum 25(OH)D response with respect to sunbed lamp output (100W, 160W and High Pressure).

Time frame: 12 weeks

To characterize serum 25(OH)D level with respect to skin lightness.

Time frame: 12 weeks