Feeling lonely? No need: At any given time, there are literally trillions of microorganisms crawling on or in you. For instance, a 200-pound adult carries around two to six pounds of bacteria wherever he goes. Although that might sound disturbing at first, this ‘cohabitation’ is essential for human health: these bacteria produce certain vitamins, help us break down nutrients or teach our immune system how to recognise dangerous invaders.

Learn more about the micorbiome on our blog.

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