NOW Potassium Citrate 99mg - Potassium is an important mineral used in various bodily functions. It is an important factor in the maintenance of the body’s acid-base balance and nerve conduction, as well as the transfer of nutrients through cell membranes. Potassium is found in a number of foods including dairy, fish and other meats, fruits, vegetables and whole grains, but food processing reduces the levels of naturally occurring nutrients in foods. Supplementation may be necessary to insure adequate intake. This citrate capsule form of potassium provides superior absorption.