I see you recommended the DASH diet but that diet specifies the need for foods rich in potassium. I had understood that potassium, like sodium, are both to be kept low. Or does one only even have to think about that if blood tests suggest that the kidneys are not processing those minerals? CKD and diets seem to be a contradictory minefield. Does one need to adjust diet to prevent stressing the kidneys or does one only have to adjust if the kidneys have deteriorated to the point of not processing these minerals, as shown by blood test results? (My GFR was 46 at the most recent test.)

I recommend the DASH diet for patients with chronic kidney disease (CKD) Stage 1, 2 or 3.  In most cases, potassium is not a problem when the estimated glomerular filtration rate (eGFR) is greater than 30 milliliters per minute per 1.73 meters squared.  It is most important that sodium be restricted because this will make high blood pressure easier to treat and diets high in potassium and low in sodium have been shown to help lower blood pressure.  Blood pressure control is critical to slow progression of CKD.  If the blood potassium is high, then DASH diet may not be the best choice.  Some patients with diabetes may have an elevated blood potassium and this could result in a need to limit potassium in the diet.  You can learn more about the DASH diet at:  https://www.nhlbi.nih.gov/health/health-topics/topics/dash



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