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Right now, there are trillions of bacteria, fungi and viruses of various types working inside your intestines. In this video, our reporter Mariana Alvim explains that this is a very good thing. The intestinal microbiota, this set of microbes that live inside our belly from our first moments of life and that play a role, almost always silent, in our immunity and mental health. Watch and understand. Also read texts about the intestines: https://www.bbc.com/portuguese/geral-... https://www.bbc.com/portuguese/vert-f... https://www.bbc.com/portuguese/geral-... https://www.bbc.com/portuguese/curios... https://www.bbc.com/portuguese/geral-... Did you like it? Subscribe to the BBC News Brasil channel! And if you want to read more news, click here: https://www.bbcbrasil.com #bbcnewsbrasil #health #science