Electrolytes are electrically charged minerals that your body depends on to function. They regulate fluid balance, trigger muscle contractions, support nerve signaling, and help maintain a steady heartbeat. Without them, nothing works quite right.
The main electrolytes are sodium, potassium, magnesium, and calcium—and your body can't produce them on its own. You get them through food and water, and you lose them constantly through sweat, urination, and even breathing. When levels drop too low, the effects are hard to miss: muscle cramps, fatigue, brain fog, headaches, and poor sleep are among the most common signs of electrolyte depletion.