The Hidden Syndrome Affecting Nine Out of Ten American Adults

A Condition Most Americans Have Never Heard Of — But Almost Certainly Have

Imagine being diagnosed with a serious medical condition that affects roughly 90 percent of all American adults — one that dramatically raises your risk of heart disease, kidney failure, and diabetes — and never having heard its name. That's the reality with cardiovascular-kidney-metabolic syndrome, or CKM syndrome. And thanks to a landmark new medical guideline, that obscurity may finally be coming to an end.

The American Heart Association and the American College of Cardiology, along with two other leading medical organizations, have developed the first-ever guideline aimed at preventing and managing CKM syndrome — an interconnected set of health conditions that significantly increase the risk of multiorgan complications and negative cardiovascular outcomes. The guideline was released on June 9, 2026.

What Exactly Is CKM Syndrome?

CKM syndrome affects 90 percent of Americans because it's broadly defined to capture everyone on the continuum — from those who might feel well but have early metabolic risk factors, to those with full-fledged heart disease. In other words, the syndrome isn't a single disease but a spectrum. Risk factors include excess weight, high blood pressure, abnormal lipids, high blood glucose, or reduced kidney function.

The guideline identifies four stages of CKM syndrome based on the functioning of the heart, kidneys, and metabolism. Stage 1 includes patients with overweight, obesity, or prediabetes who do not have other metabolic risk factors. Stage 3 includes patients with asymptomatic cardiovascular disease and CKM risk factors, or those with a high predicted 10-year risk for cardiovascular disease. Stage 4 includes patients with diagnosed CVD and overweight or obesity, kidney disease, or other metabolic risk factors. Critically, nearly 90 percent of adults met criteria for one of the stages of the syndrome as of 2020, and 15 percent were already in an advanced stage.

The CKM framework was only formalized in 2023, and physician guidelines for identifying and managing it weren't issued until June 2026, so the syndrome is just now gaining recognition. That's a startling gap between the scale of the problem and the medical world's formal response to it.

This Isn't About Overdiagnosing — It's About Prevention

Experts are quick to clarify that having CKM syndrome doesn't mean 90 percent of Americans require treatment. The goal isn't to overmedicalize, but to push prevention: to make Americans aware that they are at least at risk for progression of one or more of these conditions — metabolic, kidney, or heart — and that early lifestyle management can help.

So much of the American public falls between Stage 1 and Stage 4 CKM syndrome because of typical lifestyle behaviors. "We live in a 24-hours-a-day society where we may struggle to eat healthy foods, be physically active and get enough sleep," one expert noted. Roughly 20 percent of U.S. adults also use tobacco products, which ratchets up risk.

What the New Guidelines Recommend

At early stages, treatment centers on lifestyle interventions. A Mediterranean-style diet has been shown to mitigate blood pressure and blood sugar while also reducing long-term cardiovascular risk. Beyond diet, the guidelines also emphasize being physically active, avoiding nicotine products, and getting quality sleep.

In a significant milestone, the guideline marks the first time that GLP-1 receptor agonist therapies have been recommended for select individuals with obesity, type 2 diabetes, and other risk factors for cardiovascular disease to reduce the risk of cardiac events. More established medications — including metformin to lower blood sugar, statins to combat high cholesterol, and ACE inhibitors to control blood pressure — are also still recommended for people at higher stages.

The concept that cardiovascular health should no longer be separated from metabolic and kidney health is central to the new framework. The guideline "calls for earlier screening and care, focusing on prevention and coordinated action to reduce the risk of cardiovascular disease before serious complications develop or a major cardiac event occurs," according to the chair of the guideline writing committee. For the vast majority of Americans quietly sitting somewhere on the CKM spectrum, that shift in thinking could prove to be a lifesaver.