When poet Walt Whitman wrote that we "contain multitudes," he was speaking metaphorically, but he was correct in the literal sense. Every human being carries over 100 trillion individual bacterial cells within the intestine -- ten times more cells than comprise the body itself.
Perelman School of Medicine
Dan Rader of the Perelman School of Medicine comments on a cholesterol-medication experimental study.
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Debra Schilling Wolfe
Executive Director, Field Center for Children’s Policy, Practice & Research
University of Pennsylvania