Creatinine values are measured to correct results for urine dilution.

Creatinine is a waste product produced by muscles from the breakdown of a compound called creatine. Creatinine is filtered from the blood by the kidneys and released into the urine.

The amount of creatinine produced in the body is dependent on muscle mass and is relatively constant for an individual. The amount of creatinine removed from the blood depends on both the filtering ability of the kidneys and the rate at which blood is carried to the kidneys.

Blood and urine creatinine concentrations reflect kidney function; they may be used for comparing to other substances as the level of creatinine in blood is normally stable and, in urine, it reflects how dilute or concentrated the urine is.

A urine creatinine concentration is part of every FMV analysis. All urinary biomarkers are ratioed to the creatinine concentration for standardization.

Urinary creatinine is commonly used as a laboratory standardization when evaluating urinary analytes. Creatinine excretion is influenced by muscle mass and body habitus since creatinine formation occurs in muscle. Dietary intake of proteins containing arginine and glycine (precursors of creatine) and creatine supplementation can elevate levels. Hydration status may also play a role in urinary creatinine levels.

Creatinine values are measured to correct results for urine dilution.

Creatinine is a waste product produced by muscles from the breakdown of a compound called creatine. Creatinine is filtered from the blood by the kidneys and released into the urine.

The amount of creatinine produced in the body is dependent on muscle mass and is relatively constant for an individual. The amount of creatinine removed from the blood depends on both the filtering ability of the kidneys and the rate at which blood is carried to the kidneys.

The "Creatinine Urine Excretion" test is a valuable component of urinalysis that helps in evaluating the health and functioning of the kidneys. Essentially, this test measures the amount of creatinine that is expelled from the body through urine over a certain period, which is usually 24 hours.

Creatinine is a waste product produced by muscles and is typically filtered out of the blood by the kidneys. By measuring the amount of creatinine excreted in the urine over a 24-hour period, this test helps assess kidney function. Consistent levels of creatinine excretion indicate stable kidney function, whereas abnormal levels can point to kidney impairment. Furthermore, the 24-hour urine creatinine measurement is often used to validate the completeness of the 24-hour urine collection, ensuring that the collected sample is representative of the patient's typical urine output. This aspect is crucial for accurately interpreting other results from the urine analysis, such as protein levels.

Creatinine is the endproduct of creatine metabolism. Creatine is present primarily in muscle and the amount of creatinine produced is related to total skeletal muscle mass. Daily creatinine production is fairly constant except when there is massive injury to muscle. The kidneys excrete creatinine very efficiently and blood levels and daily urinary excretion of creatinine fluctuates very little in healthy normal people. Since blood and daily urine excretion of creatinine shows minimal fluctuation, creatinine excretion is useful in determining whether 24-hour urine specimens for other analytes (e.g., protein) have been completely and accurately collected.