This morning I became very ill from too much K. I had taken 3 tablets of K Citrate (99 mg/each) before bed, and had taken about 500 mg total during the day yesterday, prior to that last dose. I woke up this a.m. with profuse sweating, severe nausea, diarrhea and heart palpitations. I have been drinking coconut water (690 mg K) 2 times a day for about a year and sometimes taking 4 packs of Emergen-C (which has 200 mg K/per pack) in addition, and never had any problems with that. When I switched to the supps for convenience sake, it ended up making me sick. I just wanted to post this, so others are made aware that sometimes THE SOURCE of the K is an important thing to consider.