It can be found in oceans and seas, in the soil, in rocks and minerals, and in plants and animals.
Potassium is the third most abundant mineral in the human body.
Conditions such as high fever, loss of body fluids, stress, shock, or other trauma can lead to K loss from our bodies that can endanger our well being. Doctors sometimes prescribe K supplements to overcome such losses. Proper diet is the best guarantee that K intake is sufficient to support good health. For example, a potato, baked with skin, contains more than 800 milligrams of K, a whole raw banana 450 milligrams. Eating a balanced diet is the number one defense against illnesses and other factors which can lead to K shortages.