The balance of microbes in the human gut varies substantially from morning to night and even more by season — with profound fluctuations completely transforming

In experiments with mice and humans, a team led by Johns Hopkins Medicine researchers says it has identified a particular intestinal immune cell that impacts

The human immune system is incredibly versatile. Among its most skilled multitaskers are T cells, known for their role in everything from fighting infection to

Changing the structure of a dietary fiber commonly found in a range of food products has been found to promote healthy gut bacteria and reduce

People with irritable bowel syndrome (IBS) have lower bacterial diversity in the intestine than do healthy people, according to a team of Korean investigators. The

Changes in a single gene open the door for harmful gut bacteria to set off the inflammation that drives Crohn’s disease, according to a new