90% of adults in the US at risk of heart disease. What to know about metabolic syndrome

Nearly 90% of adults over age 20 in the United States are at risk of developing heart disease, an alarming new study suggests.

While the unexpectedly high number doesn’t mean that the majority of adults in the US have full-blown heart disease, it does indicate that many are at risk of developing the condition, even younger people.

Researchers identified people at high risk using a recently defined syndrome that takes into account the strong links between heart disease, obesity, diabetes and kidney disease, according to the research published Wednesday in JAMA.

The American Heart Association alerted doctors in October about