Ultraviolet and Infrared Therapy - Sun parlor

Ultraviolet radiation is a part of the sunlight, in photochemical and biological sense very active.
The component UV-A (wivelength 315 - 400 nm) is more energy-poor, and because of its better penetration it has curative importance. UV radiation with the wavelength 250 – 300 nm is involved in the production of vitamin D.
The sunshine component UV-B (wivelength 280 - 315 nm) is the main cause of sun-induced erythema and skin pigmentation.
The component UV-C (wivelength < 280 nm) is absorbed in upper layers of atmosphere owing to the ozone layer. It has bactericide nature.
Cautiously applied UV light can improve the body immune response, muscle performance, and it supports the creation of red blood cells. On the other hand in a long-run UV-C light and also some other components have carcinogenic nature.
Modern solariums are the combination of multiple UV and infrared radiation. They are good for the prevention of rachitis, poor health condition, fatigue, anaemia, some neuralgia and a set of allergic and skin diseases (special lamps).
Application has to be designed by a doctor, it lasts from 30 seconds and after gradual increase (by 1 minute) could be applied up to 10 minutes (which is strictly individual).