Impact of Work Environment Absent of Natural Light on Vitamin D Levels

Impact of Work Environment Absent of Natural Light on Vitamin D Levels

Three types of workers exposed to different levels of natural sunlight will be tested for Vitamin D blood level, PTH, Ca, P, albumin and alkaline phosphatase.

In addition, each tested worker will be asked to fill a questionnaire for demographic, medical and personal habit information.

Inclusion Criteria:

• people employed in their current work place at least 6 months,

Exclusion Criteria:

• people who consume food additives containing Vitamin D.
• people who have a chronic illness which harms the Vitamin D absorption, such as Celiac, chronic Pancreatitis, Cystic Fibrosis and IBS.
• people who have a chronic illness which harms Vitamin D metabolism, such as chronic hepatitis, kidney insufficiency and Nephrotic Syndrome.
• pregnant women.
• people who require prescribed medicine like steroids, anti-convulsion, and HIV treatments.