By Stephen Beech

Family dogs boost teenagers' mental health - by changing microbes that live in their bodies, according to a new study.

Researchers found that pet pooches prompt changes in the microbiome, the collection of all microorganisms - including bacteria, fungi and viruses - that inhabit the human body.

Previous studies have shown that the community of microbes play a crucial role in health, immunity and digestion.

The composition of a person's microbiome is unique and can change based on factors such as diet, medication, and environmental exposures.

Study author Professor Takefumi Kikusui, of Azabu University in Japan, said: “Raising dogs has beneficial effects, especially for adolescents, and these effects may be mediated through symbiosis with microorganisms."

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