A little-known health syndrome quietly affects most adults—but understanding how your heart, kidneys, and metabolism connect could be a game changer. Credit: Shutterstock A large majority of U.S. adults are unfamiliar with cardiovascular-kidney-metabolic (CKM) syndrome, even though it affects nearly 90% of adults nationwide. CKM syndrome is a recently defined condition that brings together several major health problems, including heart disease, kidney disease, diabetes and obesity. According to