standards of care.
Clues in the Liver and Kidneys
Creatinine is a waste product from muscles. Healthy kidneys filter it into the urine. When creatinine rises in the blood, it often signals reduced kidney function. In the Swedish analysis, people in the top two creatinine quintiles had lower odds of reaching 100. That fits the broader link between kidney health and survival. Mild reductions in kidney filtration can appear with age, dehydration, or medications. Persistent elevations deserve evaluation, since they may reflect chronic kidney disease. On the liver side, higher
