Nearly half of the U.S. population has diabetes or prediabetes—and many have no clue. Are you among them?

Roughly half of the U.S. population has diabetes or its predecessor. It makes us a nation of sick people, experts say—driving up the country’s health care infrastructure and staffing needs and the cost of health care, and harming the economy in a way never seen before in U.S. history. (Credit: Illustration by Getty Images)

It was the summer of 2017, and Prince Blue wasn’t feeling so hot. But he had no clue as to why. The 34-year-old police officer and father of three saw his doctor annually for check-ups, and his labs were always fine.

“I was urinating a lot, dizzy,” he recalls. “I would lose weight without working out, even when I knew I’d been eating bad.”