Simply drop a tablet into water to enrich it with vitamins and electrolytes, such as sodium and magnesium with virtually no calories. Why Choose? Packed with vitamins and electrolytes, such as sodium and magnesium 9 calories per serving About Hydro Tablets Hydro Hydro tablets meets your sodium requirements at a specific concentration (30mmol/L, and are packed with electrolytes and vitamins. It was developed for the British Sailing team at the 2008 Beijing Olympics. Simply drop a tablet into water for a high electrolyte drink, with virtually no calories. Key Features Simply drop in water to provide a high electrolyte drink Contents: 20 x 4.2g Tablets Informed Sport Registered: Our complete product range is developed using a world-class approach to banned substance testing, providing assurance for athletes. For more information on Informed Sport & our unique world class approach, click here. Suitable For: Vegans, Vegetarians, Lactose free, Gluten Free, Wheat Free, Nut Free, Soya Free