@plug41klee0 Welcome to Mayo Clinic Connect. You are asking about potassium supplements and the effect on your kidneys.

Who recommended your potassium supplements? Have you been regularly tested for potassium levels by your doctors? Potassium can be hard on the kidneys, and many people are able to use dietary means, like bananas, potatoes, tomatoes, melons, oranges to increase their levels naturally. For me, because I am taking 120mg furosemide twice a day, I also take 300 mg potassium a day to combat the effect of "stripping" my system of potassium. My levels continue to be within normal range.

Here is an article from Medical News Today about potassium and our kidneys: https://www.medicalnewstoday.com/articles/kidney-disease-and-potassium

Has your kidney function level been trending downwards over time?
Ginger