The mouth starts the digestion process by breaking food down into a more easily digestible form. It does this through a combination of mechanical and chemical digestion. After people take food in ...

While gut bacteria play an essential (if not always socially tactful) role in human nutrition, a wealth of recent research ...

When your stomach is empty, your body releases the hormone ghrelin. It’s a chemical messenger. It signals your brain to give ...

The human gut figures prominently in some of the English language’s most cliched expressions. We’re often told to “trust our gut” when it comes time to make a tricky decision. Movies or television ...

An organ is a group of tissues that work together to perform a specific task in the body, such as digesting nutrients or producing chemical messengers that enable brain cells to communicate. Although ...

Sign up for CNN’s Eat, But Better: Mediterranean Style. Our eight-part guide shows you a delicious expert-backed eating lifestyle that will boost your health for ...