A normal creatine level is 0.7 to 1.3 milligram per deciliter of blood for men and 0.6 to 1.1 milligram per deciliter of blood in women, according to Medline Plus. Women tend to have lower creatine levels than men because they often have less muscle mass.
Creatine is a compound that exists within the body as a waste product. It is a chemical that the human body synthesizes, and the muscles use it as an energy source, states Medline Plus. Doctors may order creatine level blood tests to determine kidney function in a patient. High creatine levels may indicate kidney problems, urinary tract blockage, dehydration, muscle problems and pregnancy issues, while low creatine levels may signal carious muscle and nerve issues.