What is the function of Potassium? As a mineral of dietary importance, potassium relaxes both the nerves and muscles, supports blood circulation and nerve cell activity. In addition to this, potassium lowers sodium levels and helps lower high blood pressure at the same time. Last but not least, potassium regulates body fluids (extracellular fluid, to be more exact).
Potassium deficiency symptoms include: muscle weakness, general fatigue, heart problems, extrasystoles, irregular heartbeat, confusion, irritability, chronic diarrhea. Note: although not present in the list above, bananas, winter squash, cantaloupe and broccoli are also great sources of potassium.

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