a narrow opening produced by cleavage or separation of parts. 2. cleavage (def 1). 3. Anatomy. a natural division or groove in an organ, as in the brain. verb (used with object), fissured, fissuring. 4. to make fissures in; cleave; split.
A diet rich in potassium helps to counterbalance some of sodium's harmful effects on blood pressure. Foods that are good sources of potassium are listed in the Food Sources of Potassium table on the next page.
A lower-sodium diet is good for people who are older, who are of African American descent, or who have high blood pressure or diabetes. These folks should limit their sodium intake to no more than 2,300â2,400 mg a day. People with heart failure or kidney disease are advised to keep their sodium intake under 2,000 mg a day. To continue reading this article, you must login.