Study Finds Nearly 8 in 10 23-Year-Olds Show Early Signs of Cardiovascular‑Kidney‑Metabolic (CKM) Syndrome

# What the study measured

# How CKM syndrome is defined Association defined CKM syndrome in 2023 to combine metabolic dysfunction, chronic kidney disease, and cardiovascular disease into a single framework. The system uses five stages:

• Stage 0: no risk factors
• Stage 1: excess or dysfunctional adiposity
• Stage 2: metabolic risk factors (for example, high triglycerides, elevated blood glucose, high blood pressure) or presence of kidney disease
• Stage 3: subclinical cardiovascular disease or high‑risk equivalents without symptoms
• Stage 4: established cardiovascular conditions (coronary heart disease, heart failure, stroke)

# What the FF‑CHAYA analysis found

• 20.7% were Stage 0
• 40.2% were Stage 1 (excess or dysfunctional adiposity)
• 36.2% were Stage 2 (metabolic or kidney risk factors)
• 2.8% were Stage 3
• 0% were Stage 4

# Arterial imaging and what it showed Researchers used ultrasound of the carotid arteries to measure arterial wall thickness, an established proxy for early atherosclerosis. Participants classified in more advanced CKM stages had thicker carotid walls, consistent with early arterial injury and plaque development appearing decades before typical clinical events.

Study author Donald Lloyd‑Jones said the CKM staging approach and the American Heart Association's Life's Essential 8 score were "complementary for identifying adults younger than age 30 who may be on the fast track for arterial injury, plaque build‑up and, ultimately, at higher risk for future cardiovascular events."

# Biology linking the three systems The study summary reviews mechanisms connecting adiposity, metabolic dysfunction, kidney injury, and vascular disease. Excess fat releases inflammatory signals and promotes insulin resistance. This metabolic environment can cause glomerular hyperfiltration and activate the renin‑angiotensin system, which raises blood pressure and contributes to kidney and arterial damage. Inflammation is described as a central axis in the interaction between obesity and chronic kidney disease that accelerates atherosclerosis.

# Implications the researchers draw

# Bottom line A large sample of young adults shows a high prevalence of early CKM risk factors and detectable arterial changes on imaging. The findings suggest risk assessment and prevention strategies may need to start well before middle age to address processes that are already under way by the early 20s.