One day is all it takes for the mix of microbes in the human gut to fluctuate when diets change.
People who radically altered their eating habits from an omnivorous diet to one composed of plants or to one containing only meat, eggs and cheeses changed the relative amounts and activities of their gut microbes, researchers report December 11 in Nature.
"A few decades ago people said, 'You are what you eat,' " says microbiologist Martin Blaser of New York University. The new study, he says, shows that "what you eat definitely affects your bugs."
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