What is the normal range for urine osmolality?

Urine osmolality is a measure of the concentration of solutes in urine, indicating the kidney's ability to concentrate or dilute urine. The normal range for urine osmolality is considered to be between 50 and 1200 mOsm/kg. This wide range reflects the kidney's responsiveness to various physiological conditions, such as hydration status, fluid intake, and underlying health issues.

In a healthy individual, urine osmolality can fluctuate significantly depending on hydration levels. For example, in states of dehydration, urine osmolality increases as the kidneys conserve water and concentrate solutes. Conversely, in a well-hydrated state, urine osmolality decreases as excess water is excreted, leading to more dilute urine.

Understanding this range is essential for interpreting laboratory results in clinical practice, as it provides insights into a patient's renal function and hydration status.