If there were a deadly disease raging through your body, wouldn't you want to know how to stop it? Unfortunately, more than 6 million Americans are walking around with a silent killer eating away at their health—and they have no idea they're even at risk. That silent killer is diabetes, the fastest-growing disease in history.

It's estimated that 80 million people in the United States have diabetes or are on the verge of developing this disease. Diabetes is particularly prevalent in the African-American community, where it claims nearly 100 lives every single day. "It's time to get out of denial," Oprah says.

Because so many people are affected, the United States is forced to spend $174 billion a year treating this disease—more than AIDS and all cancers combined. "If we don't fix the problem of diabetes in this country, we will bankrupt our future ability to pay for healthcare in the nation," Dr. Oz says.

As a heart surgeon, Dr. Oz says 25 percent of the patients he operates on have diabetes. Still, he says there's hope for anyone who's suffering or at risk. "Most diabetes is preventable," he says. "It is treatable, even reversible."


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