What is one of the main roles of potassium in the body?

Potassium plays a critical role in maintaining fluid balance and facilitating muscle contraction in the body. As an essential electrolyte, it helps regulate the amount of fluid in and around cells, which is vital for maintaining proper cellular function. Additionally, potassium is crucial for the nervous system; it helps generate action potentials, which are necessary for muscle contractions, including the heart. This role in muscle function underscores its importance in overall cardiovascular health and physical performance. As a result, adequate potassium levels are necessary to support these physiological processes effectively.