Hypokalemia is a medical condition characterized by low levels of potassium in the blood. Potassium is an essential mineral that helps regulate various bodily functions, including muscle contractions and nerve signals. Normal potassium levels typically range from 3.5 to 5.0 milliequivalents per liter (mEq/L). When levels fall below this range, it can lead to symptoms such as muscle weakness, fatigue, and irregular heart rhythms. The causes of hypokalemia can vary and may include excessive loss of potassium through vomiting, diarrhea, or the use of certain medications like diuretics. Additionally, inadequate dietary intake of potassium-rich foods, such as bananas and leafy greens, can contribute to the condition. Treatment often involves dietary changes or potassium supplements, depending on the severity of the deficiency.