Electrolyte powders are dietary supplements that contain essential minerals like sodium, potassium, magnesium, and calcium. These minerals help maintain the body's fluid balance, support muscle function, and regulate nerve signals. People often use electrolyte powders to rehydrate after exercise, illness, or during hot weather. To use electrolyte powders, you typically mix them with water to create a drink. They are popular among athletes and individuals who engage in intense physical activities, as they help replenish lost electrolytes and prevent dehydration. Many brands offer various flavors and formulations to suit different needs and preferences.