Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Nutrition for Advanced Chronic Kidney Disease in Adults ?
    ### Response:
    Keeping the proper level of potassium in the blood is essential. Potassium keeps the heart beating regularly and muscles working right. Problems can occur when blood potassium levels are either too low or too high. Damaged kidneys allow potassium to build up in the blood, causing serious heart problems.
    