For any of you that are sun-phobic, or don’t want to use the tanning beds because of fears of skin cancer, you should know (if you don’t already) that what is achieved through the UV exposure is an increase in the amount of vitamin D that your skin produces. Vitamin D is a natural anti-inflammatory that has been found to reduce the incidence and/or severity of several autoimmune diseases, including rheumatoid arthritis, multiple sclerosis, and Type 1 diabetes. Some of the most common treatments for psoriasis are vitamin D analogs.
Obligatory disclaimer - IANAD - I just work with some of the best vitamin D researchers in the country.
Vitamin D is generally available in 400 IU and 1000 IU pills at most health food stores. The current safety data indicates that doses up to 4000 IU per day are safe, and that most people who don’t get out into the sun a lot need at least 1000 IU per day to keep their body stores at a level sufficient to minimize inflammation and maximize calcium absorption. I would suggest finding a doc who keeps up with the literature, or is open to discussion, and who will take your circulating 25(OH)D levels (not 1,25-(OH)D) once or twice a year to monitor your levels.
Cites
Others available upon request if you are interested.
CE Hayes. Vitamin D: a natural inhibitor of multiple sclerosis. Proceedings of the Nutrition Society 2000 59:531-535.
RP Heaney, KM Davies, TC Chen, MF Holick, and MJ Barger-Lux. Human serum 25-hydroxycholecalciferol response to extended oral dosing with cholecalciferol. American Journal of Clinical Nutrition 2003 77:204-210.
MF Holick. Vitamin D: importance in the prevention of cancers, type 1 diabetes, heart disease, and osteoporosis. American Journal of Clinical Nutrition 2004 79:362–371.
BW Hollis. Circulating 25-Hydroxyvitamin D levels indicative of vitamin D sufficiency: implications for establishing a new effective dietary intake recommendation for vitamin D. Journal of Nutrition 2005 135:317-322.
E Hypponen, E Laara, A Reunanen, M Jarvelin and SM Virtanen. Intake of vitamin D and risk of type 1 diabetes: a birth-cohort study. Lancet 2001 358: 1500-1503.
LA Merlino, J Curtis, TR Mikuls, JR Cerhan, LA Criswell and others. Vitamin D intake is inversely associated with rheumatoid arthritis. Arthritis and Rheumatism 2004 50:1;72-77.
AL Munger, SM Zhang, E O’Reilly, MA Hernan, MJ Olek, and others. Vitamin D intake and incidence of multiple sclerosis. Neurology 2004 62:60-65.