Many websites have information on the normal range of creatinine levels, including NLM.NIH.gov, NewHealthGuide.org, Kidney-Symptom.com and Kidney-Treatment.org. These websites also offer information regarding kidney disease, creatinine test procedures and symptoms of abnormal creatinine levels.
A normal creatinine result is approximately 0.7 to 1.3 mg/dL for men and 0.6 to 1.1 mg/dL for women. Creatinine levels vary with age, gender, muscle mass and other factors.
Creatinine levels are a reliable measure of kidney function. Higher than normal creatinine results could indicate impairment or malfunction of the kidneys, dehydration, high muscle mass or another underlying condition. Lower than normal creatinine results can occur due to muscle-wasting diseases, chronic liver disease, low protein diets and pregnancy.