The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile

Inclusion Criteria: 1. Age \> 18 years 2. Vitamin D 25-OH level \< 20 ng/ml Exclusion Criteria: 1. Serum calcium \> 10.5 mg/dl 2. Serum phosphorus \> 5.5 mg/dl 3. Serum parathyroid hormone (PTH) level \< 12 pg/ml 4. LDL cholesterol \> 190 mg/dl 5. History of recent acute infection (within 1 month) 6. Glomerular filtration rate(GFR) \< 60 mL/min 7. Liver Function tests indicative of liver disease (aspartate aminotransferase (AST) or alanine transferase (ALT) \> 3x ULN) 8. Current use of Vitamin D \> 400 IU/day 9. Current use of any statins, fibrates, niacin, or ezetimibe 10. Current use of any medications affecting sensitivity to UV light 11. Pregnancy (self-reported) 12. Intentional UV exposure (e.g. tanning bed use) in the last 2 weeks or planned use while participating in the study 13. history of malignancy not in remission (\> 6 months) 14. History of malignant melanoma 15. Participation in an investigational drug study within 30 days of the screening visit 16. Any medical, psychological or social condition that, in the opinion of the Investigator, would jeopardize the health or well-being of the participant during any study procedures or the integrity of the data. 17. History of any non-melanoma skin cancer