Gut Clue: Human Brain Growth Linked to Digestive System

Northwestern University

Microbes supporting the production of more metabolic energy could be key to the evolution of large brains

  • First study to show gut microbes from different animal species shape variations in their biology
  • Offers new take on human evolution, particularly the evolution of our large brains
  • Mice with large-brain primate microbes eat more, but grew slower and put on less body fat
  • Their bodies use the excess energy to produce high levels of glucose, which is the brain's primary fuel source
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