probiotics

In recent years, a body of research has shown that beneficial microbes play a critical role in how our bodies work. And it turns out there's a lot of communication between our gut and our brain.

As many as 15 percent of babies have colic, which can cause bouts of inconsolable crying. Researchers are testing probiotics to see if these good bacteria can help. But they don't know how the supplements work, or how they may affect children's health long term.

When gut microbes break down certain foods like red meat and eggs, they produce a compound tied to risks for heart attack, stroke and death, a study found. The research could lead to new ways to prevent heart disease by shifting the mix of gut bacteria.