Why is potassium important enough to earn a spot on the new nutrition labels anyway? Potassium is a mineral that, together with sodium, regulates your body’s fluid levels. According to the Journal of the American College of Cardiology, increasing potassium intake lowers the risk of stroke by 21%. In addition to delivering oxygen to the brain, potassium is key to heart health, managing blood pressure, assisting the nervous system, and metabolizing carbohydrates. Potassium becomes even more important as you age, reducing your risk of kidney stones and bone loss.