Potassium is a mineral that serves as an electrolyte and is involved in the balance of fluid within the body. The body contains more than twice as much potassium as sodium. Potassium contributes to controlling activities in the heart, the muscles, and the nervous system. Potassium regulates the water balance and acid-base balance in the blood and tissues. Evidence is showing that potassium is also involved in bone calcification. Pure Encapsulations Potassium Magnesium (aspartate) 90 capsules SAVE 20% ON PURE ENCAPSULATIONS! USE CODE save IN COUPON SECTION AT CHECKOUT. $10.60 20% off MSRP on this select brand. Type SAVE in coupon box on order form. Hans A. Nieper, M.D. Professional Formulas Potassium Orotate 100 caps Advanced Research Potassium Orotate 175 mg 100 Caps BodyBio 1 Potassium 4 fl oz ***SPEND $75 OR MORE AFTER COUPONS AND DISCOUNTS AND REGULAR SHIPPING IS FREE! IN THE COUPON SECTION, TYPE FREESHIP. IT CAN ALSO BE SELECTED IN THE DROP DOWN SHIPPING MENU ON THE ORDER FORM. IF THE ORDER IS $75 OR MORE AFTER COUPONS AND DISCOUNTS, NO SHIPPING WILL BE ADDED TO YOUR TOTAL*** Thank you for visiting our store. We strive to meet your needs and if there is anything we can do to make this a more effective experience, please let us know. We are committed to providing the absolute best quality products along with the best in customer service.