title: Subliminal ultraviolet-B irradiation for the prevention of vitamin D deficiency in the elderly: a feasibility study.
abstract: OBJECTIVE
  To investigate whether daily subliminal ultraviolet-B irradiation in elderly subjects can maintain a normal vitamin D status.
  
  
  METHODS
  In an open, uncontrolled study, 10 residents (four men and six women), mean age on entry of 83 years (range 65-97 years), from a residential nursing home in County Durham, England, were exposed daily to an artificial source of ultraviolet-B radiation equivalent to 15 min of summer sunshine. The change in plasma 25-hydroxyvitamin D levels following irradiation was measured.
  
  
  RESULTS
  Improvement in the vitamin D status of the elderly residents was achieved with no change in their routine and with no intervention on the part of carers.
  
  
  CONCLUSIONS
  On the basis of this small pilot study we conclude that subliminal ultraviolet-B irradiation may be effective in maintaining vitamin D status in elderly people at a lower cost than that of using oral vitamin D supplementation. Further controlled studies are needed before this technique can be recommended to change health policy with regard to the vitamin D status of institutionalised elderly people.
authors.affiliation: Department of Rheumatology, Dryburn Hospital, Durham, UK.
authors.forename: A
authors.initials: A
authors.lastname: Chuck
authors.forename: J
authors.initials: J
authors.lastname: Todd
authors.forename: B
authors.initials: B
authors.lastname: Diffey
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003362:Cost-Benefit Analysis; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D014467:Ultraviolet Therapy / Q000379:methods*; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000032:analysis / Q000528:radiation effects*; D014808:Vitamin D Deficiency / Q000517:prevention & control*
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D