Creatinine is essentially a metabolite of creatinine phosphate, a compound that acts as a source of energy in muscle. Men tend to have higher creatinine levels than women due to their greater skeletal ...

DEAR DR. ROACH: I am a 73-year-old female. A recent blood test returned an eGFR (estimated glomerular filtration rate) of 59. My physician’s nurse told me that the test was normal. When I asked her ...

Although they share similar names, creatine and creatinine are two distinct compounds. Creatine is a naturally occurring substance in your brain and muscle tissue that gives your muscles energy.

Creatinine is a natural byproduct of muscle activity, released into the bloodstream as we move and stay active. Under normal circumstances, healthy kidneys efficiently filter it out, keeping levels ...