A heart-healthy diet and lifestyle will protect your kidneys. But kidney function declines with age in some people, although it doesn’t necessarily cause a problem unless you have other health conditions. Smoking, excessive alcohol consumption, high blood pressure, and high blood sugar (diabetes) all harm the kidneys and can lead to chronic kidney disease. Once kidney function reaches a certain low level, extra steps such as kidney-protecting medication may be necessary. Proven steps to slow down declining kidney function are to keep your blood pressure and blood sugar within norms, lower your cholesterol, and don't eat too much protein, which can strain weak kidneys.
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