ORS Zero Sugar — Electrolytes (sodium, potassium and magnesium) drive fluid balance, nerve signalling and muscle function — replacing what's lost through sweat supports hydration and performance. Electrolytes (sodium, potassium and magnesium) drive fluid balance, nerve signalling and muscle function — replacing what's lost through sweat supports hydration and performance. How to use: Mix into water or your drink of choice once daily, or as directed on the label.