How does dehydration affect creatinine test results?

Dehydration can cause elevated creatinine levels because the kidneys may struggle to filter waste properly when there is not enough fluid in the body. This can lead to a false indication of impaired kidney function. To get accurate test results, it’s important to stay well-hydrated before your creatinine test. If you’re dehydrated, your doctor may recommend rehydration and a follow-up test to confirm the initial results and get a more accurate assessment of your kidney function.