Routine blood tests will show high creatinine levels with progressive kidney disease. If this hasn't been mentioned to you yet, chances are good that you just have a diet that's a little ambitious with the potassium. In my case, when my first catheter ablation failed and I was admitted to the ER for tests, they put me on amiodarone to stop the arrhythmia and gave them two large white long tablets. I asked, and they said my potassium was low. This is strange because I eat, without a word of a lie, about half a cup of peanut butter each day with bread for breakfast. Lots of potassium there. Potatoes, beets, dried apricots, coconut water....all rich sources of potassium, and I get all of them at least once a week. But...... ???!!

That said, a single healthy kidney should dump everything in excess. That means magnesium, calcium, and potassium, as examples. So it's worth pursuing with your doctor. If you reduce your intake by approximately 30%, and then get another assay in about three weeks, that should tell you if you need to investigate further.