Imagine a routine blood draw at your annual physical that could warn you about depression before you ever feel it coming.

A new study suggests depression may soon be detectable through a simple blood test—by tracking how certain immune cells age.

In a major breakthrough, researchers have developed a simple blood test that may one day help doctors predict how fast ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Scientists have developed ...

A blood draw takes about five minutes. Analyzing what it reveals about how quickly your immune cells are aging could, ...