The investigators conducted an open controlled clinical trial in 20 hypertensive subjects with normal renal function who were randomized to a usual diet group (UD n=10), or a high potassium diet group (HKD, n= 10). Fruits and vegetables were used to increase potassium intake. All participants were on an ACEi or and ARB. Serum potassium concentration, 3- day food records and 24 Hour urine collections were completed at baseline and at the end of the 4-week study.