Production of vitamin D
Solar radiation - exactly UVB radiation affects the synthesis of vitamin D in our skin. It is an important ingredient called vitamin hormone by scientists, which is involved in the regulation of many processes in our body. Needed for the development of the skeletal system, but also for the proper functioning of the immune system, circulatory system and digestive system . It also contributes to the relief of psoriasis and atopic dermatitis. There are theories that the use of filters may lead to its shortages, but there is no conclusive evidence.
Remember that no filter cream protects the skin 100% against the sun. To ensure an adequate level of synthesis of vitamins D should be exposed to solar radiation between 10-15 minutes only 18% of the body surface (approximately the same as the area of the arms and legs).
Frequent vitamin deficiencies D rather result from the climate in which we live, because the UK do not belong to tropical countries. The days with cloudless blue sky and burning sun is next to nothing, so you should think about supplementation.