Potassium is said to be the most dangerous of the essential nutrients. While mild chronic overdoses are probably not damaging, because of the efficiency of the kidneys in clearing excesses, a very large acute overdose can be extremely dangerous if not cleared in time. As little as 8 to 10 thousand milligrams of potassium taken suddenly can give nausea. A teaspoonful of potassium salt contains about 3300 milligrams of potassium. As little as 14,000 milligrams of potassium taken suddenly can cause death in some replete people, especially those who normally have a low intake for long periods prior. Therefore, one may not use supplements without regard to any caution. However the reason I do not recommend supplements is because normally it is quite possible to receive all the potassium you need from food, and this source is inherently safe, inexpensive, and with reasonable wisdom, balanced with respect to other nutrients. Food as a source usually results in shorter hospital stays than supplements [Norris]. My recommendation against supplements is based primarily on concern of an imbalance with other nutrients rather than any likely chance of an acute overdose.
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