iAge

Age is just a number, as they say. And we all know people who seem much younger—or older—than what the calendar says. But Nazish Sayed, a professor of surgery at the Stanford Cardiovascular Institute, thinks a more useful way to gauge age is to measure the age-related inflammation in a person’s body. Those inflammatory cells can help predict how likely you are to develop cancer, heart disease, and degenerative disorders that become more common as you get older. (Segment produced by Sydney Jezik)