Exposure to the sun has a beneficial effect on the female joints, decreasing by an average of 20% probability of occurrence of arthritis.
Sun bathing protect women against the development of rheumatoid arthritis, as U.S. experts have found out in the course of long-term studies, reports Daily Mail.
Participants in the experiment, which began in 1976 and ended in 2009, more than 230,000 were women. Experts watched one group of subjects, from 30 to 55 years, and for the other - from 25 to 42 years. The scientists tracked the level of exposure to ultraviolet radiation member, in connection with what has been used a complex indicator of solar radiation, which was based mainly on the latitude, altitude and cloud cover. Also took into account the geographical factor: women were a resident of the different parts of America - from Alaska to Hawaii. Over the entire study period in 1314 rheumatoid arthritis sick people.
Thus, it was possible to calculate that the constant exposure to sunlight reduced on average by 20% the risk of disease. The use of sunscreens with significantly reduced the protective effect.
While experts find it difficult to explain the facts established. According to one hypothesis, a similar effect is associated with an active synthesis of vitamin D.
Rheumatoid arthritis - an autoimmune disease that causes inflammation in the joints. The main symptoms of arthritis - severe pain in the joints and the appearance of tumors. Women, according to statistics, the disease face three times more often than men.