Gatorade, since its inception in 1965, has combined salt with heavy amounts of sugar to help revive exhausted athletes and give them extra energy to finish the game. Propel, launched in 2002 ...

Propel is calorie-free with added vitamins, while Gatorade contains more sugar and calories but offers a low-calorie option with Gatorade Zero. What is the purpose of electrolytes in Propel?