Scientists from the University of Helsinki claim that children should be allowed to play in the fresh air and mud, as they boost immunity while doing so. The study got published in the journal Science Advances, Medical Xpress writes.
Specialists experimented on 75 children aged three to five. Some of them played on playgrounds, with the grass of the forest, and walked in the woods.
According to the study, children who played in the mud had bacteria multiplied on the skin, which boosted the immune system. The content of anti-inflammatory protein IL-10 in blood samples was increased.
Scientists have concluded that contact with microbes in the upper layers of the soil is important for children.
