Scientists from the University of Toronto found that in patients with psoriatic arthritis often a substantial shortage of vitamin D. Psoriasis is a common chronic skin disease caused by an autoimmune failure, it is characterized by red scaly patches on the skin surface. Psoriatic arthritis is psoriasis, accompanied by inflammatory arthritis. All psoriasis occurs in three percent of the world's population.
Most often, the lack of vitamin D observed in the residents of Northern regions, people living in higher latitudes, as a vitamin deficiency develops due to insufficient sun exposure. Reduced vitamin is observed in patients with autoimmune diseases such as rheumatoid arthritis, scleroderma, lupus erythematosus.
The scientists decided to identify the prevalence of vitamin D deficiency in patients with psoriatic arthritis, they watched 258 patients in the winter and 214 in the summer in two geographically distant places in the arthritis clinic in Toronto and at the medical center in Haifa.
In the Northern part of the lack of vitamin a was observed in 56 percent of patients in the winter and 59 in the summer. On the southern site indices were equal to 51 and 62 percent, respectively. Scientists have concluded that to maintain health in patients with psoriatic arthritis need more vitamin D than for the General population.