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Is Your Gut Ruling Your Brain on Food Choices?
People may no longer have to blame their food cravings — and giving in to them — on poor self-control.
Now scientists are arguing that microbes living in the gut are responsible for manipulating eating behavior by causing cravings for food they favor for fitness or that suppress their competition. Alternatively, microbiota in the gut may send out signals via the vagus nerve to the brain to induce dysphoria and goad people into eating what the microbe needs whether it’s good for the host or not, a diverse group of researchers are suggesting.
“Bacteria within the gut are manipulative,” Carlo Maley, PhD, director, Center for Evolution and Cancer, University of California at San Francisco, states in a press release. “There is a diversity of interests represented in the microbiome, some aligned with our own dietary goals and others not.”
In their overview of eating behavior and the microbiome published online August 7, 2014 in BioEssays, Joe Alcock, MD, University of New Mexico, Albuquerque, and colleagues argue that certain microbes are highly dependent on the nutrient composition of the diet.
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