It is true that avocados are very high in potassium. If you have early Stage 2 or 3 chronic kidney disease (CKD), then potassium is usually not a problem. This means if your estimated glomerular filtration rate (eGFR) is greater than 30 milliliters per minute per 1.73 meters squared, then potassium is rarely a problem. If you have Stage 4 or 5 with eGFR less than 30, then you may need to check with your physician and monitor your blood potassium levels. If there is no CKD, then avocados are safe for almost everyone.