DEAR DR. ROACH: Recently I almost experienced kidney failure from a probable infection. I am a male, age 68. My glomerular filtration rate (GFR) ranges from 44-50, and my weight is 132 pounds. My blood pressure is 110/60 mm Hg, and I enjoy various endurance sports.
Besides limiting my protein, salt and saturated fat intake, as well as getting adequate hydration, do you have additional recommendatio…