An essential mineral to your wellbeing, potassium builds proteins and muscle in your body. Your body also requires it to break down carbohydrates into glucose. As an electrolyte, it regulates the electrical activity in your heart as well as maintaing the acidbase balance. The recommended dietary intake of potassium is 4,700 milligrams per person. A 1cup serving of pear juice has 534 milligrams of potassium, over 11 percent of your RDI.