Dietary changes affect gut microbes within a day

Menu restricted to meat, egg and cheese alters bacterial mix more than eating only plants

MICROBIAL MIX  After switching from an omnivorous diet to an animal-based one, people had a greater abundance of Bilophila (shown) and other gut bacteria that can withstand bile. 

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One day is all it takes for the mix of microbes in the human gut to fluctuate when diets change.