Effervescent tablets for making a sports drink with vitamins. With sweeteners. Isostar Powertabs Lemon are effervescent tablets for the preparation of an energy-reduced sports drink containing carbohydrates and electrolytes. The vitamins and minerals contained support muscle function and energy metabolism. The isotonic drink in the form of effervescent tablets is perfect for on the go and easy to use. Benefits of Isostar Powertabs Lemon , the effervescent tablets are ideal for on the go , ideal thirst quencher for before, during and after sport , isotonic drink with important vitamins and minerals that are lost during sweating. The contained vitamin B1, calcium and magnesium contribute to a normal energy metabolism. The minerals calcium and magnesium contribute to a normal muscle function