1. Creatine - Mayo Clinic

     
  2. CREATINE - Uses, Side Effects, and More - WebMD

  3. Creatine - Wikipedia

  4. Understanding Creatinine
    Creatinine is a waste product of muscle activity that your kidneys filter out of your blood and send to your urine.
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  5. Creatine: Uses, Side Effects & Warnings - Drugs.com

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