Renal hyperfiltration may be an underestimated risk factor for mortality, according to research. Conventionally, diminished kidney function is linked to chronic kidney disease and elevated risk of mortality. Renal hyperfiltration (RHF), or increased kidney function, has been largely dismissed as a normal observation in the general population and an expected manifestation of diabetes mellitus where it precedes renal decline. The condition, devoid of clinical manifestations, remains unknown to general medicine and is primarily screened and managed within the context of diabetes mellitus. Two recent studies reveal that the harms of RHF might be highly underestimated, independent of diabetes mellitus. The...