It is not possible to raise one's glomerular filtration rate, or GFR, according to the National Institute of Diabetes and Digestive and Kidney Diseases. However, there are several things a person can do to prevent it from dropping lower, such as keeping blood pressure in a safe range.
Glomerular filtration rate refers to how well a person's kidneys are filtering, states the National Institute of Diabetes and Digestive and Kidney Diseases. A score of 60 or above is normal. A score lower than that may indicate kidney disease, and a score lower than 15 indicates kidney failure. To keep the GFR from falling, a person should keep her cholesterol within a safe range and avoid eating too much salt.