Naka Pro E2 Electrolytes + Energy - A natural sport drink formula that helps to enhance physical performance, without caffeine, and maintain a normal electrolyte balance. Electrolytes are nutrients that are important for various functions in the body from muscle contraction and relaxation to maintaining water balance inside and outside of cells. Electrolytes are lost whenever the body loses fluids whether through sweat, urination, diarrhea or vomiting. When excessive fluids are lost, it is very important to not only replenish with water but also with electrolytes. Without added electrolytes, the body cannot properly absorb water into cells and dehydration can occur.