Diet Chart For Nephrotic Syndrome Nephrotic syndrome is a kidney disorder that occurs when the filtering units of the kidney get damaged. It affects and makes the body excrete too much protein in the urine. A healthy diet for Nephrotic patients consists of low-salt, low-fat moderate protein, and low-cholesterol diet. Avoid eating high-carb foods, high-protein food, unhealthy fats, fried foods, junk foods, processed foods, and preserved foods. Caffeine, alcohol, and high sodium can contribute to high blood pressure and edema