Facing a new challenge

Mammals have existed on Earth for millions of years. During this long period, mammals and their gut commensal microbes have coevolved and coadapted, forming a complex and inseparable interrelationship called “superorganisms.” On the one hand, the food and gut environment play an important role in shaping the composition and function of gut microbiota. On the other hand, gut microbiota actively participates in host nutrition metabolism and...