Summary: Researchers report gut bacteria influence the brain when it comes to deciding on foods to eat.

Source: PLOS.

Neuroscientists have, for the first time, shown that gut bacteria “speak” to the brain to control food choices in animals. In a study publishing April 25 in the Open Access journal PLOS Biology, researchers identified two species of bacteria that have an impact on animal dietary decisions. The investigation was led by Carlos Ribeiro, and colleagues from the Champalimaud Centre for the Unknown in Lisbon, Portugal and Monash University, Australia.

There’s no question that nutrients and the microbiome, the community of bacteria that resides in the gut, impact health. For instance, diseases like obesity have been associated with the composition of the diet and the microbiome.

However, the notion that microbes might also be able to control behavior seems a big conceptual leap. Yet that’s what the new study shows.