Dan Gill for The New York Times
Dr. Jeffrey I. Gordon, left, and Vanessa K. Ridaura
are two members of a scientific team whose research shows a connection
between human gut bacteria and obesity.
The evidence is from a novel experiment involving mice and humans that
is part of a growing fascination with gut bacteria and their role in
health and diseases like irritable bowel syndrome and Crohn’s disease.
In this case, the focus was on obesity. Researchers found pairs of human
twins in which one was obese and the other lean. They transferred gut
bacteria from these twins into mice and watched what happened. The mice
with bacteria from fat twins grew fat; those that got bacteria from lean
twins stayed lean.
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