During intense physical activity, the body loses fluids and electrolytes through sweat, which can affect performance and increase the risk of injury if not properly replaced1. While plain water effectively replenishes fluids, it does not replace the electrolytes and carbohydrates lost through sweat. On the other hand, isotonic drinks not only restore fluids but also provide essential minerals and energy.
For this reason, many people choose to consume isotonic drinks to help the body rehydrate more efficiently than plain water and to quickly replace the fluids, electrolytes, and energy lost during exercise.
Generally, isotonic drinks consist of water, carbohydrates, electrolyte salts, juices, vitamins, colorants, and flavourings to improve organoleptic properties. The osmolality value of isotonic drink is typically adjusted to be close to the osmotic pressure of blood (270–330 mOsm/kg of water) to ensure rapid absorption and maintain hydration2.
Overview of Isotonic Drink
