Is there a diet to follow for polycystic kidney disease? i have normal function. my father & brother both went into kidney failure @ 50. i'm 45.

Depends on situation: You should meet with your doctor & clarify your personal situation. Pkd is a genetic disease that should be obvious on a kidney ultrasound by your age. If you are unaffected then there is little reason for you to worry any more about it.

ADPKD: YES! Diet should be low salt, low animal protein (30-40 grams per day maximum), very low saturated fat, higher polyunsaturated fats are ok,and high intake of fruit and vegetables. Avoid simple carbs and sugars as much as possible. Drink 4 to 5 liters of fluid per day. Avoid caffeine. Do not smoke. Achieve ideal body weight. 80-90 percent of food should be fruit and veg