High-protein diets aren't often recommended for the kidneys. Protein tends to create a significant amount of metabolic waste, especially when this nutrient comes from meat. Because the body is unable to use this waste, it must be eliminated by the kidneys. But if your kidney function is already impaired, the waste can begin to build up within your bloodstream and further damage these organs. Most medical professionals suggest a low-protein diet for people with renal disorders.
Diet
The only time high-protein diets are recommended for the kidneys is during dialysis. As excess waste, salt and water are removed from the blood, this process of filtration takes a toll on your muscles and other tissues in the body. According to the National Kidney Foundation, the right amount of protein can help build muscle and repair damaged tissue, so your doctor might increase your daily intake of this nutrient.
Protein
Though the amount of protein needed varies from person to person, it isn't uncommon for doctors to recommend eating anywhere from 8 to 10 oz. of high-protein foods each day, advises the National Institutes of Health. Fish, poultry, egg whites, legumes, nuts, low-fat dairy and protein powder are all considered healthier sources of protein. Lean cuts of beef and pork may also be permissible, but talk to your doctor or dietitian before including any high-protein foods in your diet.
Kidneys
The effect protein has on the kidneys in people with renal disorders doesn't necessarily pertain to those with normal kidney function. High-protein diets shouldn't damage healthy kidneys when followed for the short-term, according to MayoClinic.com. If you're maintaining a high-protein diet to lose weight, only use this weight-loss plan for three to four months. After this time, switch to a well-balanced diet with a low caloric intake to shed the excess pounds.
Kidney Failure
That being said, earlier stages of kidney failure rarely cause any discernible symptoms, so you might not know you've developed a renal disorder. The damage to these organs develops slowly over time, and you might not suffer any discomfort until the condition has progressed. You may then begin to experience nausea, vomiting, loss of appetite and fatigue. Kidney failure also causes a decreased urine output, swelling of the feet and ankles, muscle cramps, weakness and sleep disruptions.
Diagnosis
Before starting high-protein diets, talk to your doctor. If you believe you're suffering from a renal disorder, medical professionals can run a blood or urine test to look for any abnormalities. Blood with high levels of urea, a waste product from protein, can be an indication of a kidney problem. A high-protein diet may not be best in this situation.
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