Most adults should consume 4.7 grams of potassium per day, although the specific amount needed varies person by person depending upon levels of sodium and magnesium in the blood, according to the San Francisco Chronicle. Most adults in the United States consume between 2.3 and 3.1 grams of potassium daily.
Proper potassium levels are essential for maintaining a healthy heartbeat and assisting in muscle contraction, food digestion and cell-to-cell communication, says the San Francisco Chronicle. Potassium is found in a wide variety of fruits, vegetables, proteins and milk products, including bananas, potatoes, red meat and yogurt. A cup of cooked lima beans provides 20 percent of the daily recommended level of potassium.