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Creatinine (/ k r i ˈ æ t ɪ n ɪ n,-ˌ n iː n /; from Ancient Greek κρέας (kréas) 'flesh') is a breakdown product of creatine phosphate from muscle and protein metabolism. It is released at a constant rate by the body (depending on muscle mass). [3] [4]
The normal serum creatinine (sCr) varies with the subject's body muscle mass and with the technique used to measure it. For the adult male, the normal range is 0.6 to 1.2 mg/dl, or 53 to 106 μmol/L by the kinetic or enzymatic method, and 0.8 to 1.5 mg/dl, or 70 to 133 μmol/L by the older manual Jaffé reaction.
All of the estimating equations depend on a prediction of the 24-hour creatinine excretion rate, which is a function of muscle mass which is quite variable. The Cockcroft-Gault and CKD-EPI 2021 equations (see below) do not correct for race. With a higher muscle mass, serum creatinine will be higher for any given rate of clearance. [19]
Creatinine is a byproduct of created and is related to your kidney health. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us ...
One of the measures of kidney function is the glomerular filtration rate (GFR). Other tests that can assess the function of the kidneys include assessment of electrolyte levels such as potassium and phosphate, assessment of acid-base status by the measurement of bicarbonate levels from a vein, and assessment of the full blood count for anaemia.
Similar to how it can help mitigate age-related loss of muscle mass, a combination of creatine supplementation and physical activity ... days—to keep the muscle creatine levels high" and get all ...
The most reliable test in the diagnosis of rhabdomyolysis is the level of creatine kinase (CK) in the blood. [5] This enzyme is released by damaged muscle, and levels above 1000 U/L (5 times the upper limit of normal (ULN)) indicate rhabdomyolysis. [5]
“In my playing days, I never understood creatine beyond building muscle mass,” Byers says. “I didn’t realize the cognitive and neuroprotective benefits until about three or four years ago.”