Blood testsĬreatinine that comes from your blood is called serum creatinine, and it can be measured by administering a routine blood test. The most common test methods are via blood and urine. If you had or currently have kidney disease, kidney damage, diabetes, or another illness that affects your kidneys, or are taking a medication that could affect your kidneys, your healthcare provider might order regular creatinine measurement to monitor your renal function. Healthcare providers like to keep an eye on creatinine levels for various reasons. Once these values are normalized, changes from this range can signify abnormalities of the kidney.” “This depends on age, race, gender, and body size. “Creatinine level assessment starts with getting a demographic baseline to assess what ‘normal levels’ should be,” Dr. To accurately measure blood creatinine levels, a doctor will first assess these various factors to establish a baseline, according to Taylor Graber, MD, an anesthesiologist and founder of ASAP IVs. Muscle breakdown creates creatinine, so your muscle mass and activity level can influence the amount in your blood. However, there are a lot of variables when it comes to levels of creatinine. In most cases, the normal range for serum creatinine (found in the blood) for someone with healthy kidneys is 0.9 to 1.3 mg per deciliter for adult males and 0.6 to 1.1 mg per deciliter for adult females. For this reason, physicians will often use a creatinine test-along with other lab tests, like a blood urea nitrogen (BUN) test-to monitor for chronic kidney disease (CKD) or renal failure. After serving its purpose, creatine becomes creatinine and re-enters the bloodstream en route to the kidneys.Įven though creatinine doesn’t actively benefit (or harm) your body, the amount of creatinine in your blood can be measured to evaluate your kidney health. During exertion, your muscles convert creatine to energy, which assists in muscle contraction. So, how does your body generate creatinine? It starts with creatine, which is synthesized in the kidneys, pancreas, and liver, then transported via blood flow and stored in your skeletal muscles.
It simply stays in the blood until reaching the kidneys, where it’s filtered and eliminated through urination. Creatinine itself doesn’t have a specific physiological function-it’s just a waste product. Creatinine is a natural byproduct of muscle use, caused by the breakdown of a chemical called creatine. What is creatinine?Įveryone has certain serum creatinine levels in their bloodstream. While it might be the last thing you think about while you’re timing your miles or hitting a one-rep max, your blood creatinine levels can be a key indicator of your renal health and kidney function. When your muscles break down during exercise, they slowly build back up, increasing muscle mass, but this process also releases waste products into your blood, primarily creatinine. But there’s a whole lot more going on under the surface. Like most people, you’re acutely aware of how physical activity makes your body feel- the breathing, sweat, and heat. And when you’re done, nothing feels better than a warm shower, a cold glass of water, and a seat on the couch. You’re breathing fast, and your muscles are on fire. You’re on mile two of your afternoon run, or powering through a third set on the bench, or biking uphill on your daily commute.
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