“What can cause your creatinine levels to be high?”

You can lower the creatinine levels by decreasing the protein intake avoid smoking, decrease your alcohol consumption, decrease the salt intake, and eliminate any supplement containing creatine. The foods to avoid are many such as salty meals, meat, white bread, processed food. High quantity of proteins (protein supplements) caffeine etc. The normal creatinine level for a 15 to 17 years is 1.02 mg/dL of serum creatinine level. Thank you.

So many. If you are afraid consult with your primary.