Now, the ball is a child’s gut. A poor diet changes the microbes within. It also impairs the child’s immune system, changing its ability to control the gut microbiome and opening the door to harmful infections that disrupt the communities even further. And once these communities start wrecking the gut, they stop it from absorbing nutrients efficiently, leading to even worse malnutrition, more severe immune problems, more distorted microbiomes, and so on. Up and up the ball goes, until it crests the summit and slips into the next dysbiotic valley. Once microbiomes end up there, it can be hard
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