A reduction in the sodium/potassium index may be more important than the corresponding changes in either electrolyte alone.S6.2-99 Some but not all studies suggest that the intervention effect may be restricted to adult patients with a low (1500-mg to 2000-mg) daily intake of potassium.S6.2-92,S6.2-100 Most of the intervention experience comes from trials of relatively short duration but the BP-lowering effect of potassium in adult patients consuming a high- sodium diet has been reproduced after an interval of 4.4 In most trials, potassium supplementation was achieved by administration of potassium chloride pills, but the BP response pattern was similar when di- etary modification was used.S6.2-13 Because potassium- rich diets tend to be heart healthy, they are preferred over use of pills for potassium supplementation. The 2015 Dietary Guidelines for AmericansS6.2-101 encourage a diet rich in potassium and identify the adequate intake level for adult patients as 4700 mg/day.S6.2-102 The World Health Organization recommends a potassium intake of at least 90 mmol (3510 mg) per day from food for adult Good sources of dietary potassium include fruits and vegetables, as well as low-fat dairy products, selected fish and meats, nuts, and soy products. Four to five servings of fruits and vegetables will usually provide 1500 to >3000 mg of potassium. This can be achieved by a diet, such as the DASH diet, that is high in potassium 5. 