It's well established that gum disease and rheumatoid arthritis (RA) are strongly linked. But what wasn't known, until a ...

Gum makers have claimed, for decades, chewing is good for your mental health. They’re kind of on to something. Humans have chewed on gum for millennia. Scientists are still trying to figure out why.

Humans have been chewing gum for thousands of years, long after the flavor fades and without any clear nutritional benefit. The habit dates back at least 8,000 years to Scandinavia, where people ...