There is no way to improve the glomerular filtration rate, but paying attention to kidney health can keep the number from decreasing, according to the National Institute of Diabetes and Digestive and Kidney Diseases. A glomerular filtration rate below 60 may indicate kidney disease, and a rate under 15 may indicate kidney failure.
There are a number of ways to improve kidney health, including keeping the blood pressure at an acceptable range, explains the National Institute of Diabetes and Digestive and Kidney Diseases. For most people, this number is less than 140/90 millimeters of mercury. If a person has diabetes, it is also important to control the blood glucose level, and all people must keep cholesterol levels in check.
Another way to keep the kidneys working correctly is to take medications that the doctor prescribes, states the National Institute of Diabetes and Digestive and Kidney Diseases. Cutting down on sodium to consume less than 2,300 milligrams each day and choosing heart-healthy foods, such as whole grains, fruit, vegetables and low-fat dairy, may also help. People trying to keep their glomerular filtration rate in check must also limit alcohol use, be physically active and maintain a healthy weight. For those who smoke, it is important to quit, as smoking can damage the kidneys.