Serum potassium is well regulated in healthy individuals and not much affected by a high dietary potassium intake, so toxicity is not an issue as the kidneys readily excrete excessive potassium. But renal failure, heart or liver disease, Addison's disease, major burns or muscle trauma, gastrointestinal bleeding, some drugs, or metabolic acidosis, could lead to Hyperkalemia. However even in healthy individuals, supplementing too much potassium may affect the balance of other electrolytes such as magnesium, sodium, chloride., or it may cause irregular heartbeat, vomiting, or diarrhea... Full Text