Maintaining low creatinine levels with diet requires eating less meat, staying hydrated and avoiding the dietary supplement creatine, according to Mayo Clinic. Having a high serum creatinine level is a sign of kidney damage. This damage is permanent, but treatment prevents further damage.
The primary causes of high creatinine levels are life-threatening infections, shock and cancer, reports WebMD. High creatinine levels are also associated with heart failure, severe dehydration and injuries. Kidneys are essential to the clearance of creatinine, and when they fail, creatinine builds up in the body.
To prevent dehydration, and thereby aid the kidneys, it's important to drink plenty of fluids, especially water, suggests WebMD.
Creatinine levels temporarily increase with certain medications, blood loss and meat-based diets, notes Mayo Clinic. Avoid eating large servings of meat to keep creatinine levels low in the blood.
Athletes use the supplement creatine to improve exercise performance, explains WebMD. While studies do not show that the supplement is unsafe for consumption, doctors suggest drinking more fluids than usual when taking creatine. The supplement causes muscles to take water from other parts of the body to function at their maximum power. This causes dehydration, which leads to higher creatinine levels. Use caution when taking creatine, especially while exercising in the heat.