Why the small intestine is the unsung hero of your digestive health by: Gayle Guyardo Posted: Jul 10, 2025 / 11:24 AM EDT Updated: Jul 10, 2025 / 11:24 AM EDT ...

As far back as the 16th century, we were mapping out the murky territory of the human small intestine in anatomy books. We know, for example, that this digestive tract is—on average—about 6 ...

Intestinal bacteria are important for human health as they help digest food and regulate immune function. Thus, in recent ...

The mouth is where digestion begins, and it breaks down food into smaller particles. Read more about the functions and biological structure of the mouth.

SIBO is a condition that results from an overgrowth in bacteria in the small intestine and gut. Here, MDs explain SIBO causes, symptoms, and treatment.

It can also hold food if the stomach becomes full. The stomach is an important part of the digestive system. It stores and breaks down food before passing it through to the small intestine.

The immune system cytokine interleukin-22 (IL-22), plays a key role in combating bacterial pathogens such as those that cause food poisoning.

Nutrition therapist Lauren Kelly gives the breakdown on how the digestive system breaks down food in our bodies.