Your kidneys are very adaptable in the face of demand, but there can come a point where they may be adversely affected by excesses of certain substances, even those found in foods typically considered healthy. Although it is natural for the kidneys to degrade with age, there are measures you can take to boost their longevity.
Function
Every substance that you consume is metabolized by your body and enters the bloodstream, which is filtered by your kidneys. Unhealthy kidneys are unable to filter some substances properly, thus resulting in toxicity in the bloodstream, which may lead to disease.
Significance
Some foods contain substances that speed up the process of declining kidney function. It's essential to your health to avoid these substances as much as possible, because once a kidney is rendered dysfunctional, it becomes more susceptible to further degradation.
The Facts
Although it may be obvious that substances such as alcohol should be avoided, there are also nutritional culprits that may affect kidney function as well. According to the National Kidney and Urologic Diseases Information Clearinghouse, in order to maintain the health of your kidneys, it's important to be cautious of consuming too many foods that contain high levels of protein, potassium, phosphorus and sodium, all of which can contribute to reduced kidney function.
Prevention/Solution
Dietary restriction is best approached without extremist elimination. The National Kidney Disease Education Program recommends 0.6 to 0.8g of protein per pound of body weight per day. Some low-protein red-meat alternatives include shrimp, tofu and chicken drumsticks--not breasts. Sodium is abundant in salt, as well as canned and processed foods, which you should avoid. Potassium is found in many fruits and vegetables--steer clear of avocados, bananas, potatoes and melons. Kidney friendly alternatives include apples, cranberries, strawberries, blueberries, raspberries, plums, pineapple, cabbage, cauliflower and broccoli. Intake of phosphorous-rich foods such as dried beans, peas, milk and cheese, colas, canned iced teas and lemonade, nuts and peanut butter should also be limited if you're worried about kidney health. Popcorn, green beans, rice, sherbet, corn cereals and root beer are better alternatives.
Warning
Following a restrictive diet like this may prolong the life of your kidneys. However, dealing with high levels of kidney dysfunction may require more than simply adjusting your diet. Consult your doctor when deciding on a nutritional program, and be aware that you may still require medication to help neutralize your body's unfiltered toxins.
