The Silent Threat Affecting 37 Million Americans That Most Don’t Know They Have

Health Points

• Chronic kidney disease affects 37 million Americans, with 90% unaware they have it in early stages
• Risk factors include diabetes, high blood pressure, heart disease, family history, and age over 60
• Early detection through simple blood and urine tests can slow progression and prevent kidney failure

Chronic kidney disease quietly affects tens of millions of Americans, often progressing silently until significant damage has occurred. The condition develops when kidneys gradually lose their ability to filter waste and excess fluids from the blood, a function essential to maintaining overall health.

The kidneys perform critical work every day, processing about 200 quarts of blood to remove approximately two quarts of waste and water. When chronic kidney disease develops, this filtering system becomes impaired. Over time, dangerous levels of fluid, electrolytes, and waste can accumulate in the body.

What makes this condition particularly concerning is its stealthy nature. Most people in the early stages experience no symptoms whatsoever. By the time warning signs appear—fatigue, swelling in the ankles, difficulty concentrating, decreased appetite, or changes in urination—the disease has often advanced considerably.

Certain groups face elevated risk. People with diabetes or high blood pressure account for approximately two-thirds of all chronic kidney disease cases. Other risk factors include heart disease, obesity, a family history of kidney disease, and being over age 60. African Americans, Hispanic Americans, Native Americans, and Asian Americans face higher rates of kidney disease than the general population.

The progression of chronic kidney disease follows five stages, from minimal kidney damage in stage 1 to complete kidney failure in stage 5. During stage 5, also called end-stage renal disease, dialysis or a kidney transplant becomes necessary for survival. Without these interventions, waste buildup reaches life-threatening levels.

Diabetes remains the leading cause of kidney disease in the United States. High blood sugar levels damage the small blood vessels in the kidneys over time. Similarly, uncontrolled high blood pressure damages the blood vessels throughout the body, including those in the kidneys, reducing their ability to function effectively.

Early detection makes a substantial difference in outcomes. Simple tests can identify kidney disease before symptoms appear. A blood test measuring creatinine levels determines the glomerular filtration rate (GFR), which indicates how well kidneys are filtering. A urine test can detect albumin, a protein that appears in urine when kidneys are damaged.

Managing chronic kidney disease focuses on slowing progression and preventing complications. For many patients, controlling underlying conditions like diabetes and high blood pressure provides the foundation of treatment. Medications may include ACE inhibitors or ARBs to protect the kidneys, diuretics to reduce fluid buildup, and medications to manage cholesterol, anemia, and bone health.

Lifestyle modifications play an equally important role. Following a kidney-friendly diet—typically lower in sodium, protein, potassium, and phosphorus—reduces strain on compromised kidneys. Regular physical activity, maintaining a healthy weight, avoiding smoking, and limiting alcohol consumption all contribute to better outcomes.

As kidney disease advances, more intensive interventions become necessary. Stage 5 patients typically require dialysis, a process that artificially removes waste and excess fluid from the blood when kidneys can no longer perform this function. Hemodialysis uses a machine to filter blood outside the body, while peritoneal dialysis uses the lining of the abdomen to filter blood inside the body.

Kidney transplantation offers another option for end-stage renal disease. A healthy kidney from a living or deceased donor can restore normal kidney function. However, transplant recipients must take immunosuppressant medications for life to prevent organ rejection, and the waiting list for kidneys remains long.

Prevention remains the most effective strategy. For those without kidney disease, maintaining healthy blood pressure and blood sugar levels, staying at a healthy weight, exercising regularly, and avoiding excessive use of over-the-counter pain medications all protect kidney health. Nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen can damage kidneys when used frequently or in high doses.

Regular screening proves particularly important for high-risk individuals. The National Kidney Foundation recommends annual testing for people with diabetes, high blood pressure, heart disease, or a family history of kidney failure. Early intervention can add years or even decades of kidney function.

The financial burden of kidney disease extends beyond individual patients to the healthcare system. Medicare spending on chronic kidney disease and end-stage renal disease exceeds $130 billion annually. These costs underscore the importance of prevention and early intervention strategies.

Research continues to advance understanding and treatment of chronic kidney disease. Scientists are investigating new medications that protect kidney function, improved dialysis techniques, and ways to increase the supply of transplant organs. Artificial kidney devices that could eliminate the need for traditional dialysis show promise in early trials.

For the 37 million Americans currently living with chronic kidney disease, knowledge and proactive management offer the best path forward. Understanding risk factors, getting tested regularly, and working closely with healthcare providers can significantly slow disease progression and maintain quality of life for years to come.