Potassium is localized mostly within the cells. It regulates the osmotic pressure within the cells, is involved in cell membrane transport and also in the activation of a number of glycolytic and respiratory enzymes.
The Canadian Recommended Nutrient Intake (RNI) for potassium is 70 mg per day per kilogram of body weight; the US Committee on RDA has set minimum potassium requirements at 2000 mg per day, with levels between 1875 and 5625 mg considered ‘safe and adequate daily intake’. Intake is high in fruits, vegetables and grain and conversely, high-fat diets contain small of potassium.
Potassium deficiency is associated with a number of symptoms and may be a result of undernourishment or predominant consumption of potassium-deficient foods, e.g., white bread, fat or oil.
Requirements of potassium in human body