High blood pressure is known as a silent killer. You can have it for years without getting any symptoms until you experience a fatal heart attack. But there is another silent killer: kidney disease. Given the many priorities already on your plate, you probably haven’t given much thought to your kidneys. But since March 10 has been named World Kidney Day (and March, National Kidney Month), we’d like to draw your attention to kidney health if only for a couple of minutes. According to the National Kidney Foundation (NKF), more than 26 million Americans have kidney disease, and most of them don’t know it. By the time you experience clear symptoms, your kidneys may already be shot necessitating dialysis for the rest of your life . . . which may not be that long. Kidney disease is the 9th leading cause of death in the US. Even before symptoms of kidney disease are evident, the disease significantly raises your risk of heart attack, stroke, osteoporosis and anemia. A simple urine or…