For 00tmg (@00tmg), With my doctor's okay, I've successfully used berberine rather than metformin for many years to keep my diabetes2 under control. (My fasting test this AM was 79.) I also eat a banana daily, and bananas are a known source of potassium. The following probably doesn't have to do with your problem, but whenever I try something that's new for me, I do so gradually to give my body a chance to adjust. Perhaps you might research what various causes of high potassium are to see what might ring a bell in your experience. Best wishes for figuring it all out. Life can get complicated, can't it?